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Herbaceous Perennials

Achillea 'Moonshine' (Yarrow)

Achillea 'Moonshine' (Yarrow)

An upright perennial with feathery grey-green foliage and flat heads of small, light yellow flowers. Height 1m (3ft), Spread 50cm (1.5ft).

Achillea 'Summerwine' (Yarrow)

Achillea 'Summerwine' (Yarrow)

An upright, herbaceous perennial with linear, divided, dark green leaves and, in mid- and late summer, crimson, flat, flowerheads, fading to buff-pink. Height 1m (3ft), Spread 50cm (1.5ft).

Achillea filipendulina 'Cloth of Gold' (Yarrow)

Achillea filipendulina 'Cloth of Gold' (Yarrow)

A clump-forming, herbaceous perennial with light-green, finely divided leaves. From late summer to early autumn, it bears flat umbels of golden-yellow flowers. Height 1.5m (5ft), Spread 50cm (1.5ft).

Achillea millefolium 'Paprika' (Yarrow)

Achillea millefolium 'Paprika' (Yarrow)

An upright, clump-forming, herbaceous perennial with finely-divided, dark green leaves and, in summer, erect stems bearing flat clusters of orange-red flowers with yellow centres, that fade with age.

Achillea millefolium 'Walther Funcke' (Yarrow)

Achillea millefolium 'Walther Funcke' (Yarrow)

A perennial with brilliant orange-red flower heads produced from early to late summer above neat mounds of greyish-green, ferny foliage. Height 1m (3ft), Spread 50cm (1.5ft).

Actaea simplex 'Brunette' (Bugbane)

Actaea simplex 'Brunette' (Bugbane)

A clump-forming, herbaceous perennial with dark purple-bronze foliage and fragrant, pink-flushed white flowers on dark wiry stems in late summer to early autumn. Height 1.5m (5ft), Spread 50cm (1.5ft).

Agapanthus 'Blue Dot'

Agapanthus 'Blue Dot'

A compact, clump-forming, semi-evergreen perennial with strap-shaped, green leaves & sturdy, upright stems bearing rounded, open umbels of tubular, violet-blue flowers in mid-summer. Height 30cm (1ft), Spread 50cm (1.5ft).

Agapanthus 'Double Diamond' (African Lily)

Agapanthus 'Double Diamond' (African Lily)

A compact, clump-forming, evergreen to semi-evergreen perennial with strap-shaped, mid-green leaves, and sturdy, erect stems bearing rounded umbels of double, bell- to funnel-shaped, white flowers in summer.

Agapanthus 'Dr. Brouwer' (African Lily)

Agapanthus 'Dr. Brouwer' (African Lily)

A herbaceous perennial with dark green, strap-shaped leaves forming at its base. In late summer it bears large, spherical heads of tubular pale violet-blue and dark blue flowers on upright stems.

Agapanthus 'Ever Sapphire' (African Lily)

Agapanthus 'Ever Sapphire' (African Lily)

A compact, clump-forming, semi-evergreen perennial with linear to strap-shaped, dark green leaves, and sturdy, erect stems bearing rounded umbels of trumpet-shaped, blue flowers in summer.

Agapanthus 'Lapis Lazuli' (African Lily)

Agapanthus 'Lapis Lazuli' (African Lily)

A compact, clump-forming, half-hardy, evergreen perennial with broad, strap-shaped, dark green leaves, and sturdy, erect stems bearing rounded, open umbels of trumpet-shaped, blue flowers in summer.

Agapanthus 'Lilac Flash'

Agapanthus 'Lilac Flash'

A clump-forming, frost hardy, evergreen perennial with broad, strap-shaped, dark green leaves and sturdy, erect stems bearing dense, spherical umbels of trumpet-shaped, pale lilac flowers throughout summer.

Agapanthus 'Northern Star' (African Lily)

Agapanthus 'Northern Star' (African Lily)

A clump-forming, deciduous perennial with strap-shaped, dark green leaves, and, in early to mid-summer erect stems bearing rounded umbels of violet-blue flowers with a dark purple stripe down the centre of each petal.

Agapanthus 'Strawberry Ice' (African Lily)

Agapanthus 'Strawberry Ice' (African Lily)

A clump-forming, half-hardy, deciduous perennial with broad, strap-shaped, dark green leaves, and, in summer, sturdy, erect stems bearing rounded, open umbels of trumpet-shaped, white flowers with with a pink flush.

Agapanthus 'Streamline' (African Lily)

Agapanthus 'Streamline' (African Lily)

A small, semi-evergeen perennial with clumps of strap-like, mid-green leaves and open, mid-blue flowerheads borne on strong stems in summer to early autumn. Height & Spread 50cm (1.5ft).

Agapanthus 'Torbay' (African Lily)

Agapanthus 'Torbay' (African Lily)

A herbaceous perennial with dark-green, strap shaped leaves forming at its base. In summer, it bears spherical heads of tubular mid-blue flowers on upright stems. Height & Spread 50cm (1.5ft).

Agapanthus campanulatus (African Lily)

Agapanthus campanulatus (African Lily)

A clump-forming, deciduous to semi-evergreen perennial with strap-shaped, dark green leaves and sturdy, upright stems bearing spherical heads of tubular to trumpet-shaped, sky blue flowers in summer.

Agapanthus inapertus 'Kilmurry Blue' (African Lily)

Agapanthus inapertus 'Kilmurry Blue' (African Lily)

A clump-forming, deciduous perennial with erect, strap-shaped, mid-green leaves and sturdy, upright stems bearing rounded umbels of violet-blue flowers with a purple stripe in late summer and early autumn.

Agastache 'Blackadder' (Giant Hyssop)

Agastache 'Blackadder' (Giant Hyssop)

An upright, clump-forming, herbaceous perennial with aromatic, dark grey-green leaves and whorled spikes dark purple buds opening to tubular, two-lipped, fragrant, violet flowers from summer to early autumn.

Allium 'Gladiator'

Allium 'Gladiator'

A bulbous perennial with glossy, strap-shaped, mid-green leaves and sturdy, erect stems bearing large, dense, rounded umbels of star-shaped, lilac flowers in early summer. Height 1.5m (5ft), 50cm (1.5ft).

Allium 'Globemaster'

Allium 'Globemaster'

A bulbous, deciduous perennial with strap-shaped, grey-green leaves and globular clusters of starry violet-purple flowers on tall, erect stems in summer. Height 1.5m (5ft), Spread 50cm (1.5ft).

Allium cristophii (Star Of Persia)

Allium cristophii (Star Of Persia)

A bulbous perennial, with strap-shaped, grey-green leaves. Star-shaped, rosy-violet flowers are borne in spherical heads in early summer which are followed by attractive seed-heads. Height & Spread 60cm (2ft).

Allium hollandicum 'Purple Sensation'

Allium hollandicum 'Purple Sensation'

A bulbous perennial, with strap-shaped, grey-green leaves and small, vivid rosy-purple flowers, in crowded spherical umbels. Height 1m (3ft), Spread 60cm (2ft).

Allium stipitatum 'Mount Everest'

Allium stipitatum 'Mount Everest'

A clump-forming, bulbous perennial with glossy, strap-shaped, green leaves and, in summer, sturdy, erect stems bearing dense, rounded umbels of star-shaped, white flowers in summer. Height 1m (3ft), Spread 50cm (1.5ft).

Alstroemeria 'Indian Summer' (Peruvian Lily)

Alstroemeria 'Indian Summer' (Peruvian Lily)

An upright, clump-forming, tuberous perennial with bronze- to purple-flushed, dark green leaves and, from early summer to mid-autumn, open clusters of funnel-shaped, red-marked, yellow-orange flowers.

Alstroemeria 'Little Miss Roselind' (Peruvian Lily)

Alstroemeria 'Little Miss Roselind' (Peruvian Lily)

A compact, upright, clump-forming, tuberous perennial with lance-shaped, dark green leaves and, from early summer to mid-autumn, open clusters of funnel-shaped, deep pink flowers with brown-flecked, yellow-marked throats.

Alstroemeria 'Little Miss Sophie' (Peruvian Lily)

Alstroemeria 'Little Miss Sophie' (Peruvian Lily)

A compact, upright, clump-forming perennial with dark green leaves and, from early summer to mid-autumn, funnel-shaped, white flowers with pale pink central bands, the upper petals flecked and pale yellow at the base.

Alstroemeria 'Little Miss Tara' (Peruvian Lily)

Alstroemeria 'Little Miss Tara' (Peruvian Lily)

A dwarf, upright, bushy, clump-forming, herbaceous perennial with oblong to ovate, dark green leaves and, in summer, erect stems bearing red to reddish-pink flowers with yellow throats and black stripes on the petals.

Alstroemeria 'Summer Sky' (Peruvian Lily)

Alstroemeria 'Summer Sky' (Peruvian Lily)

An upright, clump-forming, tuberous perennial with narrowly lance-shaped, dark green leaves and, from early summer into autumn, clusters of funnel-shaped, white flowers with brown-flecked, yellow-marked upper petals.

Anemone x hybrida 'Honorine Jobert' (Japanese Anemone)

Anemone x hybrida 'Honorine Jobert' (Japanese Anemone)

One of the most beautiful plants for late summer and early autumn, this makes clumps of large, dark, divided, vine-line leaves and pure white flowers with contrasting yellow stamens. Height 1.5m (5ft), Spread 1m (3ft).

Anemone x hybrida 'Queen Charlotte' (Japanese Anemone)

Anemone x hybrida 'Queen Charlotte' (Japanese Anemone)

A pretty perennial with divided leaves and large, pink, semi-double flowers in summer. Height 1.5m (5ft), Spread 1m (3ft).

Anthriscus sylvestris 'Ravenswing' (Purple Cow Parsley)

Anthriscus sylvestris 'Ravenswing' (Purple Cow Parsley)

An upright herbaceous perennial with attractive, deep purple, finely divided foliage. From late spring to mid-summer, it bears dainty umbels of small white flowers with pink bracts. Height 1m (3ft), Spread 30cm (1ft).

Aquilegia 'Kristall' (Columbine)

Aquilegia 'Kristall' (Columbine)

A strong growing herbaceous perennial with green-blue divided foliage and nodding, pure white flowers on upright stems from late spring until early summer. Height & Spread 50cm (1.5ft).

Aquilegia vulgaris var. stellata 'Nora Barlow' (Columbine)

Aquilegia vulgaris var. stellata 'Nora Barlow' (Columbine)

An upright herbaceous perennial, with nodding, spurless, double flowers and divided, dark-green leaves. The flower heads are made of many narrow, variagated pale/dark-pink/pale-green petals.

Aquilegia vulgaris var. stellata 'Ruby Port' (Columbine)

Aquilegia vulgaris var. stellata 'Ruby Port' (Columbine)

A mound-forming, herbaceous perennial with finely-divided, light green leaves and upright stems bearing double, nodding, deep red to maroon flowers in late spring and early summer. Height 1m (3ft), Spread 50cm (1.5ft).

Aquilegia vulgaris var. stellata 'White Barlow'

Aquilegia vulgaris var. stellata 'White Barlow'

An erect, clump-forming, herbaceous perennial with divided, dark grey-green leaves and nodding, spurless, double, white flowers from late spring into summer. Height 75cm (2.5ft), Spread 50cm (1.5ft).

Artemisia ludoviciana 'Silver Queen' (Western Mugwort)

Artemisia ludoviciana 'Silver Queen' (Western Mugwort)

A clump-forming, herbaceous perennial with lance-shaped, downy, greyish-white leaves and, occasionally, plumes of small, insignificant brownish-yellow flowers in late summer to early autumn. Height & Spread 1m (3ft).

Aster novi-belgii 'Audrey' (Michaelmas Daisy)

Aster novi-belgii 'Audrey' (Michaelmas Daisy)

A compact, dwarf, clump-forming, rhizomatous perennial with branching stems, lance-shaped, mid-green leaves and clusters of lilac blue flowers with yellow centres from late summer to mid-autumn. Height & Spread 30cm (1ft).

Aster x frikartii 'Monch' (Frikart's Aster)

Aster x frikartii 'Monch' (Frikart's Aster)

An upright, bushy herbaceous perennial with ovate, rough, dark green leaves and loose clusters of yellow-centred, lavender-blue flowers from late summer to early autumn. Height 1m (3ft), Spread 50cm (1.5ft).

Astilbe 'Younique White'

Astilbe 'Younique White'

A mound-forming, deciduous perennial with ovate to lance-shaped, toothed, deeply-divided, dark green leaves and erect stems bearing branched, triangular panicles of creamy-white flowers in summer.

Astrantia major subsp. involucrata 'Shaggy' (Masterwort)

Astrantia major subsp. involucrata 'Shaggy' (Masterwort)

A herbaceous perennial, with divided leaves and branching stems bearing greenish-white flowers surrounded by narrow, green-tipped white or pinkish bracts. Height 1m (3ft), Spread 50cm (1.5ft).

Bergenia 'Harzkristall' (Elephant's Ears)

Bergenia 'Harzkristall' (Elephant's Ears)

A compact, clump-forming, evergreen perennial bearing rounded, toothed, glossy, dark green leaves and stiff, upright, reddish-brown stems bearing dense clusters of open bell-shaped, pink-flushed, white flowers in spring.

Bergenia 'Rose Crystal' (Elephant's Ears)

Bergenia 'Rose Crystal' (Elephant's Ears)

A clump-forming, evergreen perennial bearing oval, leathery, mid-green leaves and upright stems bearing dense clusters of open bell-shaped, pink flowers in mid-spring. Height 30cm (1ft), Spread 60cm (2ft).

Brunnera macrophylla 'Jack Frost' (Siberian Bugloss)

Brunnera macrophylla 'Jack Frost' (Siberian Bugloss)

A clump-forming perennial, with broad, hairy, heart-shaped leaves which are silver with green veins and blue forget-me-not type flowers in spring. Height & Spread 50cm (1.5ft).

Campanula carpatica 'Blue Clips' (Tussock Bellflower)

Campanula carpatica 'Blue Clips' (Tussock Bellflower)

A small, spreading, mound-forming perennial with light green, heart-shaped leaves and purple-blue flowers from late spring to early autumn. Height & Spread 30cm (1ft).

Campanula lactiflora 'Loddon Anna' (Milky Bellflower)

Campanula lactiflora 'Loddon Anna' (Milky Bellflower)

A clump-forming perennial with erect leafy stems bearing pointed, mid-green leaves and clusters of soft pink, bell-shaped flowers in summer. Height 1.2m (4ft), Spread 50cm (1.5ft).

Canna 'Tropicanna'

Canna 'Tropicanna'

An upright, rhizomatous perennial with large, banana-like, dark green, yellow and red-striped leaves and strong, erect stems bearing racemes of yellow-orange flowers from midsummer into early autumn.

Canna x generalis 'Tropicana Gold'

Canna x generalis 'Tropicana Gold'

An upright perennial with large, ovate, green and gold striped leaves, and bright yellow/orange flowers in summer. Height 2m (6ft), Spread 50cm (1.5ft).

Centaurea montana (Perennial Cornflower)

Centaurea montana (Perennial Cornflower)

A low-growing herbaceous perennial forming a clump of green, lance-shaped leaves and, in summer, electric blue flowers with a red centre. Height 60cm (2ft), Spread 50cm (1.5ft).

Cirsium rivulare 'Atropurpureum' (Plume Thistle)

Cirsium rivulare 'Atropurpureum' (Plume Thistle)

A herbaceous perennial forming a clump of leafy stems with round, red-purple flower heads in summer. Height 1.5m (5ft), Spread 50cm (1.5ft).

Crocosmia 'Lucifer' (Montbretia)

Crocosmia 'Lucifer' (Montbretia)

A robust, spreading perennial with pleated mid-green leaves and arching stems of bold tomato-red flowers in summer. Height 1.5m (5ft), Spread 1m (3ft).

Cynara cardunculus (Globe Artichoke)

Cynara cardunculus (Globe Artichoke)

A perennial with silvery-grey, thistle-like foliage and tall flower stems which are topped by fat thistle-like buds which resemble small globe artichokes in summer. Height 2.5m (8ft), Spread 1.5m (5ft).

Dahlia 'Arabian Night'

Dahlia 'Arabian Night'

An upright, bushy, clump-forming, tuberous perennial with pinnate, toothed dark green leaves from summer into autumn, strong, upright stems bearing double, dark red flowers with incurved petals.

Dahlia 'Bishop of Dover'

Dahlia 'Bishop of Dover'

An upright, bushy, tuberous perennial with toothed, pinnate, purple-flushed, dark green leaves and upright, dark purple stems bearing single, violet-flushed, white flowers from midsummer into autumn.

Dahlia 'Bishop of Leicester'

Dahlia 'Bishop of Leicester'

A bushy, clump-forming, tuberous perennial with toothed, purple- to black-flushed, dark green leaves and, from midsummer to early autumn, pale lavender flowers with darker lavender bands down the centre of each petal.

Dahlia 'Bishop of Llandaff'

Dahlia 'Bishop of Llandaff'

A deciduous perennial, with dark-red foliage and semi-double brilliant red flowers. Height 1m (3ft), Spread 50cm (1.5ft).

Dahlia 'Bishop of York'

Dahlia 'Bishop of York'

A bushy, clump-forming, tuberous perennial with toothed, pinnate, purple to black-flushed, dark green leaves and single to semi-double, orange-flushed, yellow flowers from midsummer to early autumn.

Dahlia 'Crazy Love'

Dahlia 'Crazy Love'

An upright, bushy, clump-forming, tuberous perennial with dark green leaves and, from midsummer to early autumn, dark purple stems bearing double, white flowers with yellow-green centres and pale lilac-pink petal tips.

Dahlia 'David Howard'

Dahlia 'David Howard'

A miniature-flowered decorative Dahlia with bronze-tinged, dark green, divided foliage and in summer and autumn it bears double bronze-orange flowers. Height & Spread 60cm (2ft).

Dahlia 'Engelhardt's Matador'

Dahlia 'Engelhardt's Matador'

An upright, bushy, clump-forming, tuberous perennial with pinnate, toothed, dark green-bronze leaves and, in summer and autumn, strong stems bearing decorative, purplish-pink flowers. Height 1m (3ft), Spread 75cm (2.5ft).

Dahlia 'Gallery Art Deco'

Dahlia 'Gallery Art Deco'

A compact, upright, bushy, clump-forming, tuberous perennial with pinnate, toothed, dark green leaves and, in summer and autumn, double flowers with yellow-orange outer petals, orange inner petals, all red on the reverse.

Dahlia 'Gallery Art Nouveau'

Dahlia 'Gallery Art Nouveau'

A clump-forming, tuberous perennial with pinnate, toothed, dark green leaves and, in summer and autumn, double flowers with red-streaked, bright pink outer petals and deep red-purple inner petals.

Dahlia 'Gallery Pinto'

Dahlia 'Gallery Pinto'

A small-flowered, decorative dahlia with a compact habit. Its divided foliage is dark-green. In summer and autumn it bears double, bright yellow flowers whose florets fade toward the edges. Height & Spread 50cm (1.5ft).

Dahlia 'Gallery Renoir'

Dahlia 'Gallery Renoir'

A small-flowered, decorative dahlia with a compact habit. Its divided foliage is dark-green. In summer and autumn it bears double, dark-pink flowers whose florets fade to pinkish-white toward the edges.

Dahlia 'Gallery Rivera'

Dahlia 'Gallery Rivera'

A compact, clump-forming, branching, upright to rounded, tuberous perennial with pinnate, toothed, dark green leaves and double, red flowers in summer and autumn. Height & Spread 30cm (1ft).

Dahlia 'Honka'

Dahlia 'Honka'

An upright, bushy, clump-forming, tuberous perennial with green leaves &, in summer & autumn, upright stems bearing single, lightly fragrant, star-like, yellow flowers with rolled petals & bright orange or yellow centres.

Delphinium 'Guardian Blue'

Delphinium 'Guardian Blue'

A low, clump-forming, herbaceous perennial with deeply lobed, mid-green leaves and erect spikes of blue flowers in summer. Height 1m (3ft), Spread 60cm (2ft).

Delphinium 'Guardian White'

Delphinium 'Guardian White'

A low, clump-forming, herbaceous perennial with deeply lobed, mid-green leaves and erect spikes of white flowers in summer. Height 1m (3ft), Spread 60cm (2ft).

Delphinium 'Magic Fountains Pure White'

Delphinium 'Magic Fountains Pure White'

An upright, clump-forming perennial with green divided foliage and in summer, bears sturdy spires of white flowers. Very attractive to bees. Height 1m (3ft), Spread 60cm (2ft).

Delphinium 'Magic Fountains Sky Blue/White Bee'

Delphinium 'Magic Fountains Sky Blue/White Bee'

An upright, clump-forming, herbaceous perennial with deeply lobed, dark green leaves and. in summer, erect racemes of semi-double, light blue flowers with white centres. Height 1m (3ft), Spread 60cm (2ft).

Dianthus deltoides 'Albus' (Maiden Pink)

Dianthus deltoides 'Albus' (Maiden Pink)

A mat-forming, evergreen perennial with tufts of linear, mid- to light green leaves and, from spring to autumn, clusters of fragrant, white flowers with fringed petals. Height 20cm (8in), Spread 50cm (1.5ft).

Dicentra spectabilis 'Alba' (White Bleeding Heart)

Dicentra spectabilis 'Alba' (White Bleeding Heart)

A clump-forming, herbaceous perennial with deeply-divided, light green leaves and arching racemes of nodding, heart-shaped, white flowers in late spring and early summer. Height & Spread 1m (3ft).

Dicentra spectabilis 'Valentine' (Bleeding Heart)

Dicentra spectabilis 'Valentine' (Bleeding Heart)

A clump-forming, herbaceous perennial with deeply-divided, often red-flushed, grey-green leaves and, in late spring and early summer, dark red stems bearing nodding, heart-shaped, red flowers with white tips.

Dicentra spectabilis (Bleeding Heart)

Dicentra spectabilis (Bleeding Heart)

A clump-forming perennial with divided, bright green leaves and arching stems bearing racemes of rose-pink and white flowers in late spring and early summer. Height 1.2m (4ft), Spread 50cm (1.5ft).

Digitalis parviflora 'Milk Chocolate' (Foxglove)

Digitalis parviflora 'Milk Chocolate' (Foxglove)

A biennial with glossy, dark green basal leaves and tall, upright spikes of red-brown flowers with purple veining in summer. Height 60cm (2ft), Spread 50cm (1.5ft).

Digitalis purpurea 'Dalmatian Purple' (Foxglove)

Digitalis purpurea 'Dalmatian Purple' (Foxglove)

A compact, rosette-forming, hairy, deciduous to semi-evergreen perennial with ovate to lance-shaped, wrinkled, toothed, dark green leaves and upright spikes of bell-shaped, spotted, purple flowers in summer.

Digitalis purpurea 'Excelsior Hybrid' (Foxglove)

Digitalis purpurea 'Excelsior Hybrid' (Foxglove)

A biennial plant, forming a basal clump of leaves then tall, upright spikes of white, yellow, pink or purple, bell-shaped flowers. Height 1.5ft (5ft), Spread 50cm (1.5ft).

Eryngium bourgatii 'Picos Amethyst' (Bourgati's Eryngo)

Eryngium bourgatii 'Picos Amethyst' (Bourgati's Eryngo)

A clump-forming, herbaceous perennial with silver-veined, dark green leaves and, in summer, branching, deep blue stems bearing lilac-blue, cone-like flowers with prominent, lance-shaped, blue bracts.

Eryngium planum 'Blue Hobbit' (Sea Holly)

Eryngium planum 'Blue Hobbit' (Sea Holly)

A herbaceous perennial with spiny edged leaves and masses of spiky, cone-like, bright purple-blue flowers on strong stems in summer and autumn. Height 1m (3ft), Spread 50cm (1.5ft).

Erysimum 'Bowles's Mauve' (Wallflower)

Erysimum 'Bowles's Mauve' (Wallflower)

An upright, bushy evergreen perennial with narrowly lance-shaped, dark grey-green leaves and erect racemes of mauve to purple flowers from late winter into summer. Height 75cm (2.5ft), Spread 60cm (2ft).

Eupatorium maculatum 'Atropurpureum'

Eupatorium maculatum 'Atropurpureum'

A large, robust herbaceous perennial with purple stems, whorled, oval leaves and flat, terminal clusters of small, reddish-purple flowers borne on erect stems in summer. Height 2.5m (8ft), Spread 1m (3ft).

Euphorbia 'Redwing' (Spurge)

Euphorbia 'Redwing' (Spurge)

A herbaceous perennial with blue-green, linear leaves arranged in whorls, that take on red tints in late winter. In spring, clusters of acid-yellow-green flowers open from reddish buds on upright, leafy stems.

Euphorbia amygdaloides var. robbiae (Mrs Robb's Bonnet)

Euphorbia amygdaloides var. robbiae (Mrs Robb's Bonnet)

A spreading, evergreen perennial with rosettes of oblong, leathery, glossy, dark green leaves and cymes of yellow-green flowers from mid-spring to early summer. Height 50cm (1.5ft), Spread 1m (3ft).

Euphorbia characias subsp. wulfenii 'Shorty'

Euphorbia characias subsp. wulfenii 'Shorty'

An upright, bushy, evergreen perennial or subshrub bearing dense whorls of linear, blue-green leaves, flushed red when young, and, in spring, small green flowers surrounded by large, bright yellow to yellow-green bracts.

Euphorbia x martinii 'Ascot Rainbow' (Spurge)

Euphorbia x martinii 'Ascot Rainbow' (Spurge)

An evergreen perennial with whorls of grey-green lance-shaped leaves edged in yellow. In cooler months, the foliage becomes flushed with shades of red, pink & orange. Clusters of lime-green flowers in early spring.

Filipendula rubra 'Venusta' (Meadowsweet)

Filipendula rubra 'Venusta' (Meadowsweet)

An erect, spreading, clump-forming perennial with bright green leaves and, in early and midsummer, crowded, terminal clusters of fragrant, rose-pink flowers that fade to pink with age.

Geranium 'Blushing Turtle' (Cranesbill)

Geranium 'Blushing Turtle' (Cranesbill)

A vigorous, upright to rounded, spreading, herbaceous perennial with deeply lobed, dark green leaves and, from summer into autumn, pink flowers with darker pink veins. Height 60cm (2ft), Spread 1m (3ft).

Geranium 'Johnson's Blue'

Geranium 'Johnson's Blue'

A vigorous, clump-forming perennial with lobed leaves and long-stems bearing rounded, dark-veined, lavender-blue flowers throughout summer. Height 50cm (1.5ft), Spread 1m (3ft).

Geranium 'Orkney Cherry'

Geranium 'Orkney Cherry'

A compact, hardy perennial with bronze foliage and, from summer into early autumn, dark pink flowers. Height & Spread 30cm (1ft).

Geranium 'Rozanne' (Cranesbill)

Geranium 'Rozanne' (Cranesbill)

A mound-forming perennial with marbled leaves that have a soft velvety texture and large, cupped, blue flowers with white centres and maroon veins in late summer. Height 60cm (2ft), Spread 1m (3ft).

Geranium macrorrhizum 'Bevan's Variety' (Cranesbill)

Geranium macrorrhizum 'Bevan's Variety' (Cranesbill)

A rhizomatous, semi-evergreen perennial with lobed, toothed, aromatic, sticky, light green leaves and clusters of purple-pink flowers in early summer. Height & Spread 50cm (1.5ft).

Geranium sanguineum 'New Hampshire Purple' (Cranesbill)

Geranium sanguineum 'New Hampshire Purple' (Cranesbill)

A mound-forming, herbaceous perennial with rounded, deeply-lobed, mid-green leaves and, from late spring into summer, single, cup-shaped, magenta flowers with darker veins. Height 30cm (1ft), Spread 50cm (1.5ft).

Geum 'Mrs J. Bradshaw' (Avens)

Geum 'Mrs J. Bradshaw' (Avens)

A clump-forming herbaceous perennial with hairy, dark-green, basal leaves and purple stems bearing semi-double, orange-red flowers in summer. Height 60cm (2ft), Spread 50cm (1.5ft).

Geum 'Petticoats Peach' (Avens)

Geum 'Petticoats Peach' (Avens)

A clump-forming, herbaceous perennial with pinnate, hairy, mid-green basal leaves and slender, burgundy stems bearing semi-double, frilled, pink-flushed, yellow flowers from late spring into midsummer.

Geum 'Primrose Cottage' (Avens)

Geum 'Primrose Cottage' (Avens)

A compact, upright, herbaceous perennial with pinnate, mid-green leaves and slender, red-brown stems bearing long-stalked, open, light yellow flowers in summer. Height & Spread 30cm (1ft).

Geum 'Totally Tangerine' (Avens)

Geum 'Totally Tangerine' (Avens)

A vigorous, mound-forming, herbaceous perennial with pinnate, hairy, mid-green basal leaves and slender stems bearing semi-double, apricot to orange flowers from late spring into autumn. Height 1m (3ft), Spread 60cm (2ft).

Helenium 'Moerheim Beauty' (Sneezeweed)

Helenium 'Moerheim Beauty' (Sneezeweed)

An upright, clump-forming perennial with lance-shaped green leaves and large, dark-centred, copper-red flowers in summer. Height 1m (3ft), Spread 50cm (1.5ft).

Hemerocallis 'Bonanza' (Daylily)

Hemerocallis 'Bonanza' (Daylily)

A herbaceous perennial with long, strap-like green leaves and large, golden-orange flowers distinctively marked with a red throat in summer. Height 75cm (2.5ft), Spread 1m (3ft).

Hemerocallis 'Stella De Oro' (Day Lily)

Hemerocallis 'Stella De Oro' (Day Lily)

A vigorous, herbaceous perennial with mid-green, strap-shaped leaves. It is free-flowering, producing golden-yellow, fragrant, funnel-shaped flowers, throughout summer. Height 30cm, Spread 50cm (1.5ft).

Hemerocallis fulva var. kwanso (Daylily)

Hemerocallis fulva var. kwanso (Daylily)

A semi-evergreen, clump-forming perennial with narrow, strap-like, dark green leaves and, in summer, double, orange, trumpet-shaped flowers with a burgundy blush. Height 1m (3ft), Spread 50cm (1.5ft).

Heuchera 'Appletini' (Alum Root)

Heuchera 'Appletini' (Alum Root)

A compact, mound-forming, semi-evergreen perennial bearing bright yellow-green leaves and slender, upright, red stems bearing panicles of small, bell-shaped, red flowers from late spring into summer.

Heuchera 'Berry Smoothie' (Alum Root)

Heuchera 'Berry Smoothie' (Alum Root)

A clump-forming, mounded, semi-evergreen perennial with rounded, lobed, ruffled, rose-pink leaves turning purple-pink with age, & tall, slender stems bearing tiny, bell-shaped, pale pink flowers from late spring to summer.

Heuchera 'Black Beauty' (Alum Root)

Heuchera 'Black Beauty' (Alum Root)

A clump-forming, semi-evergreen perennial with shiny, deep maroon leaves with undulate margins and tiny, whitish flowers on thin stalks in summer. Height & Spread 50cm (1.5ft).

Heuchera 'Cherry Truffles' (Alum Root)

Heuchera 'Cherry Truffles' (Alum Root)

A compact, mound-forming, semi-evergreen to evergreen perennial bearing rounded, shallowly lobed, rich red leaves and slender, upright stems bearing panicles of light pink flowers from late spring into summer.

Heuchera 'Fire Chief' (Alum Root)

Heuchera 'Fire Chief' (Alum Root)

A clump-forming, mounded, semi-evergreen to evergreen perennial with ruffled, dark red to purple-red leaves and dark red stems bearing small, pink-flushed, white flowers in late spring, and again from summer into autumn.

Heuchera 'Flores Sea' (Alum Root)

Heuchera 'Flores Sea' (Alum Root)

A compact, clump-forming, semi-evergreen perennial with ruffled, veined, silvery leaves that have a purple underside and hot pink flowers in late spring and summer.

Heuchera 'Forever Purple' (Alum Root)

Heuchera 'Forever Purple' (Alum Root)

A compact, mound-forming, semi-evergreen perennial bearing rounded, lobed, ruffled, silvery, dark purple leaves and short, slender, upright stems bearing panicles of purple-pink flowers throughout summer.

Heuchera 'Indian Summer Boysenberry' (Alum Root)

Heuchera 'Indian Summer Boysenberry' (Alum Root)

A compact, mound-forming, semi-evergreen perennial bearing rounded, ruffled, lobed, reddish-brown to orange-red leaves, and upright stems bearing panicles of small, bell-shaped, white flowers from late spring into summer.

Heuchera 'Indian Summer Coralberry' (Alum Root)

Heuchera 'Indian Summer Coralberry' (Alum Root)

A compact, mound-forming, semi-evergreen to evergreen perennial bearing ruffled, orange-pink leaves with dark veins and slender, upright stems bearing panicles of small, bell-shaped, white flowers in summer.

Heuchera 'Indian Summer Huckleberry' (Alum Root)

Heuchera 'Indian Summer Huckleberry' (Alum Root)

A compact, mound-forming, semi-evergreen to evergreen perennial bearing ruffled, silver-purple leaves with dark purple veins and slender, upright stems bearing panicles of small, bell-shaped, white flowers in summer.

Heuchera 'Lime Marmalade' (Alum Root)

Heuchera 'Lime Marmalade' (Alum Root)

A mound-forming, semi-evergreen to evergreen, herbaceous perennial with ruffled, lime- to yellow-green leaves and tall, slender stems bearing panicles of tiny, bell-shaped, pale brown flowers from late spring into summer.

Heuchera 'Marmalade' (Alum Root)

Heuchera 'Marmalade' (Alum Root)

A clump-forming, evergreen perennial with red stems bearing ruffled leaves that emerge copper-red or pink and turn bronze or golden-yellow with maturity. Small, bell-shaped, red-brown flowers on upright stems in summer.

Heuchera 'Midnight Rose' (Alum Root)

Heuchera 'Midnight Rose' (Alum Root)

A mound-forming, semi-evergreen perennial with dark burgundy foliage splattered pink. The pink lightens to cream as summer progresses. Height & Spread 50cm (1.5ft).

Heuchera 'Obsidian' (Alum Root)

Heuchera 'Obsidian' (Alum Root)

A clump-forming, semi-evergreen perennial with smooth, glossy, rounded, lobed, dark purple-black leaves and tall red stems bearing loose panicles of ivory flowers in summer. Height & Spread 50cm (1.5ft).

Heuchera 'Paris' (Alum Root)

Heuchera 'Paris' (Alum Root)

A compact, clump-forming, semi-evergreen to evergreen perennial forming a mound of silvery leaves with dark green veins & slender, wiry, stems bearing open panicles of small, rose-pink flowers from late spring into summer.

Heuchera 'Silver Scrolls' (Alum Root)

Heuchera 'Silver Scrolls' (Alum Root)

A compact, clump-forming, semi-evergreen perennial with ruffled, silvery, red-purple leaves and small pale green flowers in summer. Height & Spread 50cm (1.5ft).

Heuchera americana 'Plum Pudding' (Alum Root)

Heuchera americana 'Plum Pudding' (Alum Root)

A low-growing perennial that forms heart shaped, lobed, plum leaves with darker plum veining and panicles of white, tubular-shaped flowers on purple stems. Height & Spread 50cm (1.5ft).

Heuchera micrantha 'Palace Purple' (Alum Root)

Heuchera micrantha 'Palace Purple' (Alum Root)

A mound-forming, semi-evergreen perennial with ivy-like, purple leaves with red undersides. Panicles of small, pinkish-white, bell-shaped flowers are borne on slender, dark-red stems in late spring to early summer.

Heucherella 'Alabama Sunrise' (Foamy Bells)

Heucherella 'Alabama Sunrise' (Foamy Bells)

A clump-forming, semi-evergreen perennial. It has rounded leaves with cut margins that emerge yellow-green in spring, darken to green in summer then take on orangey-pink tints in autumn.

Heucherella 'Red Rover'

Heucherella 'Red Rover'

A mound-forming, semi-evergreen to evergreen perennial bearing lobed, intense red leaves, coppery red when young, and slender, upright stems bearing dense panicles of creamy-white flowers from summer into autumn.

Heucherella 'Solar Power'

Heucherella 'Solar Power'

A mound-forming, semi-evergreen perennial bearing maple-like, deeply lobed, yellow-green to golden-yellow leaves with dark red markings. Slender stems bear tiny, bell-shaped, white flowers from late spring into summer.

Heucherella 'Tapestry' (Foamy Bells)

Heucherella 'Tapestry' (Foamy Bells)

A compact, clump-forming, semi-evergreen perennial bearing mounds of blue-green leaves with dark purple veins & silver highlights, turning greener in autumn and slender stems bear pink flowers from late spring into summer.

Hosta 'Gold Standard' (Plantain Lily)

Hosta 'Gold Standard' (Plantain Lily)

A medium sized, mounding, deciduous perennial with large, heart-shaped foliage that has creamy yellow and variable dark green margins and lavender flowers throughout summer. Height 60cm (2ft), Spread 1m (3ft).

Hosta 'Halcyon' (Plantain Lily)

Hosta 'Halcyon' (Plantain Lily)

A compact, mound-forming, deciduous perennial with thick, ovate, blue-green to blue-grey leaves and sturdy, erect scapes bearing bell-shaped, silvery, pale lavender flowers in summer. Height 60cm (2ft), Spread 1m (3ft).

Hosta 'Patriot' (Plantain Lily)

Hosta 'Patriot' (Plantain Lily)

A perennial of a clump-forming habit with rounded, heart-shaped leaves edged in white and, in summer, it bears lavender flowers on erect leafy stems. Height & Spread 50cm (1.5ft).

Hosta 'Sum and Substance' (Plantain Lily)

Hosta 'Sum and Substance' (Plantain Lily)

A clump-forming perennial with broad heart-shaped, yellow-green leaves and tall stems bearing pale lilac, bell-shaped flowers in summer. Height & Spread 1m (3ft).

Iris 'Immortality' (Bearded Iris)

Iris 'Immortality' (Bearded Iris)

A clump-forming, rhizomatous perennial with upright, strap-like, dark green leaves and white flowers with yellow beards blooming in spring and again from late summer to mid-autumn. Height 1m (3ft), Spread 60cm (2ft).

Iris 'Sangreal' (Tall Bearded Iris)

Iris 'Sangreal' (Tall Bearded Iris)

A hardy perennial with grey-green, sword-like foliage and deep yellow flowers on tall stems in late spring and sometimes again in late summer. Height 75cm (2.5ft), Spread 50cm (1.5ft).

Iris 'Springtime Madonna' (Bearded Iris)

Iris 'Springtime Madonna' (Bearded Iris)

A clump-forming, rhizomatous, herbaceous perennial with upright, linear, strap-like, grey-green leaves and, in mid- to late spring, erect stems bearing pale blue flowers with pale blue fall, creamy-white at the centre.

Iris 'Swahili' (Bearded Iris)

Iris 'Swahili' (Bearded Iris)

An upright, clump-forming, rhizomatous, deciduous perennial with sword-shaped, green leaves and, in late spring and early summer, sturdy, upright stems bearing large, deep purple flowers.

Iris sibirica 'Silver Edge' (Siberian Iris)

Iris sibirica 'Silver Edge' (Siberian Iris)

A perennial, rhizomatous Iris that features upright, strap-like, semi-evergreen, blue-green foliage. It has medium-sized, mid-blue flowers with silver, ruffled edges in early summer. Height 75cm (2.5ft), Spread 60cm (2ft).

Kniphofia 'Bees' Lemon' (Red Hot Poker)

Kniphofia 'Bees' Lemon' (Red Hot Poker)

A clump-forming, deciduous perennial with toothed, grass-like, mid-green leaves &, in late summer to early autumn, upright racemes of lemon-yellow flowers opening from green buds. Height 75cm (2.5ft), Spread 50cm (1.5ft).

Kniphofia 'Nancy's Red' (Red Hot Poker)

Kniphofia 'Nancy's Red' (Red Hot Poker)

A clump-forming, upright perennial with tall stems, grassy green leaves, and tubular spikes of dusty red-orange flowers in summer. Height & Spread 50cm (1.5ft).

Leucanthemum x superbum 'Snow Lady' (Shasta Daisy)

Leucanthemum x superbum 'Snow Lady' (Shasta Daisy)

An upright, clump forming perennial that appears in spring with dark green, deeply toothed leaves and masses of beautiful large white daisy-like flowers all summer. Height & Spread 50cm (1.5ft).

Leucanthemum x superbum 'Victorian Secret' (Shasta Daisy)

Leucanthemum x superbum 'Victorian Secret' (Shasta Daisy)

A compact, clump-forming, herbaceous perennial with erect stems bearing lance-shaped, dark green leaves and, from early summer to early autumn, erect stems bearing single to semi-double, white flowers with yellow centres.

Lilium 'Starlight Express' (Lily)

Lilium 'Starlight Express' (Lily)

A bulbous perennial with dark green leaves and in summer, bears fragrant flowers with prominent anthers on tall, leafy stems. The flowers are dark pink with darker freckles and pale, wavy margins to the petals.

Lobelia cardinalis 'Queen Victoria' (Cardinal Flower)

Lobelia cardinalis 'Queen Victoria' (Cardinal Flower)

A herbaceous perennial with dark red, oblong leaves and spikes of bright scarlet, two-lipped flowers in late summer and autumn. Height 1m (3ft), Spread 60cm (2ft).

Lobelia x speciosa 'Hadspen Purple'

Lobelia x speciosa 'Hadspen Purple'

An upright, bushy, softly hairy perennial with upright stems bearing ovate to lance-shaped, purple-flushed, light green leaves and terminal racemes of two-lipped, bright purple flowers from summer into autumn.

Lobelia x speciosa 'Sparkling Ruby'

Lobelia x speciosa 'Sparkling Ruby'

A clump-forming, slightly hairy perennial with ovate to oblong, mid-green leaves and erect, leafy, terminal racemes of double lipped, ruby red to dark red flowers in summer and autumn. Height 1m (3ft), Spread 60cm (2ft).

Lupinus 'Beefeater' (Lupin)

Lupinus 'Beefeater' (Lupin)

An upright, clump-forming, herbaceous perennial with palmate, mid- to dark green leaves and, from late spring into summer, large, erect, terminal racemes of scarlet flowers with orange-flushed throats.

Lupinus 'Gallery Blue' (Lupin)

Lupinus 'Gallery Blue' (Lupin)

A compact, bushy, herbaceous perennial with attractive, mid-green, palmate leaves. In summer, it bears densly-packed, upright racemes of pea-like flowers in shades of blue. Height & Spread 50cm (1.5ft).

Lupinus 'Gallery Pink' (Lupin)

Lupinus 'Gallery Pink' (Lupin)

A dwarf, clump-froming, herbaceous perennial with mid-green, palmate leaves and tall, upright, terminal racemes of pink flowers from spring until summer. Height 60cm (2ft), Spread 30cm (1ft).

Lupinus 'Gallery Red' (Lupin)

Lupinus 'Gallery Red' (Lupin)

A dwarf, clump-forming, herbaceous perennial with palmate, mid-green leaves and tall, upright, terminal racemes of dark red flowers in summer. Height 60cm (2ft), Spread 30cm (1ft).

Lupinus 'Gallery White' (Lupin)

Lupinus 'Gallery White' (Lupin)

A dwarf, clump-forming, herbaceous perennial with palmate, mid-green leaves and tall, upright, terminal racemes of white flowers from spring until summer. Height 60cm (2ft), Spread 30cm (1ft).

Lupinus 'Gallery Yellow' (Lupin)

Lupinus 'Gallery Yellow' (Lupin)

A dwarf, clump-forming, herbaceous perennial with palmate, mid-green leaves and tall, upright, terminal racemes of pale yellow flowers from spring until summer. Height 60cm (2ft), Spread 30cm (1ft).

Lupinus 'Gladiator' (Lupin)

Lupinus 'Gladiator' (Lupin)

A vigorous, upright, clump-forming, herbaceous perennial with palmate, dark green leaves and large, erect, terminal racemes of orange and yellow flowers in summer. Height 60cm (2ft), Spread 50cm (1.5ft).

Lupinus 'King Canute' (Lupin)

Lupinus 'King Canute' (Lupin)

A vigorous, upright, clump-forming, herbaceous perennial with palmate, mid- to bright green leaves and large, erect, terminal racemes of dark blue and white flowers in summer. Height 75cm (2.5ft), Spread 50cm (1.5ft).

Lupinus 'Masterpiece' (Lupin)

Lupinus 'Masterpiece' (Lupin)

A clump-forming, herbaceous perennial with palmate, mid-green leaves and erect, terminal racemes of deep purple-red flowers with orange flecks in early summer. Height 75cm (2.5ft), Spread 50cm (1.5ft).

Lupinus 'Rachel De Thame' (Lupin)

Lupinus 'Rachel De Thame' (Lupin)

An upright, clump-forming, herbaceous perennial with mid- to bright green leaves and large, erect, terminal racemes of bright pink and white flowers from late spring into summer. Height 1m (3ft), Spread 50cm (1.5ft).

Lupinus 'Red Rum' (Lupin)

Lupinus 'Red Rum' (Lupin)

A robust, clump-forming, herbaceous perennial with palmate, mid-green leaves and erect, terminal racemes of white-flecked, red flowers from late spring into summer. Height 1m (3ft), Spread 50cm (1.5ft).

Lupinus 'Salmon Star' (Lupin)

Lupinus 'Salmon Star' (Lupin)

A vigorous, upright, clump-forming, herbaceous perennial with palmate, mid- to dark green leaves and, in summer, large, erect, terminal racemes of lilac buds opening to salmon flowers fading to yellow with age.

Lupinus 'Terracotta' (Lupin)

Lupinus 'Terracotta' (Lupin)

A robust, clump-forming, herbaceous perennial with palmate, mid-green leaves & erect, terminal racemes of purple-pink buds opening to pink-flushed orange or pale orange-red flowers in summer.

Lupinus 'Towering Inferno' (Lupin)

Lupinus 'Towering Inferno' (Lupin)

A vigorous, upright, clump-forming, herbaceous perennial with palmate, mid- to bright green leaves and large, erect, terminal racemes of deep orange to orange-red flowers in summer. Height 1m (3ft), Spread 60cm (2ft).

Lychnis chalcedonica (Maltese Cross)

Lychnis chalcedonica (Maltese Cross)

A herbaceous perennial with bright green leaves on upright stems bearing masses of bright red flowers in summer. Height 1m (3ft), Spread 50cm (1.5ft).

Nepeta 'Six Hills Giant' (Catmint)

Nepeta 'Six Hills Giant' (Catmint)

A hardy perennial with aromatic, grey-green foliage and short, purple flower spikes in summer. Height & Spread 1m (3ft).

Paeonia 'Shirley Temple' (Double Peony)

Paeonia 'Shirley Temple' (Double Peony)

An upright, bushy, herbaceous perennial with divided, dark green leaves and, in late spring and early summer, sturdy, erect stems bearing large, double, white flowers. Height 2.5m (8ft), Spread 1.5m (5ft).

Paeonia lactiflora 'General MacMahon' (Peony)

Paeonia lactiflora 'General MacMahon' (Peony)

A clump-forming, herbaceous perennial bearing red-mottled stems, dark green leaves with lance-shaped leaflets and, in summer, fragrant, double, crimson flowers with curled inner petals. Height & Spread 1m (3ft).

Paeonia lactiflora 'Kansas' (Peony)

Paeonia lactiflora 'Kansas' (Peony)

A clump-forming, herbaceous perennial with divided, dark green leaves and, in late spring and early summer, sturdy, erect stems bearing large, fragrant, double, bright reddish-pink flowers.

Paeonia lactiflora 'Karl Rosenfield' (Peony)

Paeonia lactiflora 'Karl Rosenfield' (Peony)

A herbaceous perennial with attractive, divided, mid-green leaves. In late spring and early summer, it bears large, double, crimson flowers. Height & Spread 75cm (2.5ft).

Paeonia lactiflora 'Sarah Bernhardt' (Peony)

Paeonia lactiflora 'Sarah Bernhardt' (Peony)

A herbaceous perennial with large, fragrant, rose-pink double flowers with ruffled inner petals. Height 2.5m (8ft), Spread 1.5m (5ft).

Penstemon 'Blackbird'

Penstemon 'Blackbird'

An upright perennial with lush green foliage and tubular-shaped, deep-purple flowers with a white striped throat from early summer. Height 1m (3ft), Spread 50cm (1.5ft).

Penstemon 'Hewells Pink'

Penstemon 'Hewells Pink'

An upright, clump-forming, semi-evergreen perennial with green leaves and, from early summer into autumn, upright panicles of tubular to bell-shaped, bright reddish-pink flowers with red-streaked, white throats.

Penstemon 'Port Wine'

Penstemon 'Port Wine'

A semi-evergreen perennial with green leafy stems that are tinged red. From mid summer to early autumn, it bears racemes of deep red-purple, bell-shaped flowers with white striped throats.

Persicaria amplexicaulis 'Rosea' (Red Bistort)

Persicaria amplexicaulis 'Rosea' (Red Bistort)

A robust, upright, clump-forming perennial with large, ovate to lance-shaped, pointed, prominently-veined, mid-green leaves and narrow, long-stalked spikes of pink flowers from midsummer to early autumn.

Persicaria bistorta 'Superba' (Knotweed)

Persicaria bistorta 'Superba' (Knotweed)

A mat-forming, semi-evergreen perennial with large, ovate foliage and spikes of large, white bottlebrush flowers from late-summer to early-autumn. Height 75cm (2.5ft), Spread 1m (3ft).

Phlomis russeliana (Turkish Sage)

Phlomis russeliana (Turkish Sage)

A perennial that forms large green leaves on long petioles and whorls of hooded, pale yellow flowers on tall, erect stems from late spring though to early autumn. Unlike many Phlomis, it will tolerate some shade.

Physostegia virginiana 'Rosea' (Obedient Plant)

Physostegia virginiana 'Rosea' (Obedient Plant)

An upright, spreading, herbaceous perennial with lance-shaped, toothed, dark green leaves and dense, spike-like racemes of tubular, pink flowers from midsummer into early autumn. Height 1m (3ft), Spread 60cm (2ft).

Polemonium 'Heaven Scent' (Jacob's Ladder)

Polemonium 'Heaven Scent' (Jacob's Ladder)

A mound-forming, herbaceous perennial with dark green leaves, flushed purple or bronze in spring and summer, and upright stems bearing clusters of lightly fragrant, open bell-shaped, violet to purple flowers in summer.

Pulmonaria 'Blue Ensign' (Lungwort)

Pulmonaria 'Blue Ensign' (Lungwort)

A perennial which forms a clump of ovate leaves, and clusters of bright blue flowers in early spring fading to purple with age. Height & Spread 30cm (1ft).

Pulmonaria 'Opal' (Lungwort)

Pulmonaria 'Opal' (Lungwort)

A clump forming, herbaceous perennial that has ovate, green leaves that are evenly spotted with white and has clusters of blue and white shimmering flowers throughout spring. Height 30cm (1ft), Spread 60cm (2ft).

Pulmonaria 'Trevi Fountain' (Lungwort)

Pulmonaria 'Trevi Fountain' (Lungwort)

A clump-forming, herbaceous perennial that has clumps of green, oval leaves, with silvery blotches. In spring it produces drooping clusters of funnel-shaped, cobalt blue and purplish-pink flowers.

Pulmonaria 'Victorian Brooch' (Lungwort)

Pulmonaria 'Victorian Brooch' (Lungwort)

A clump-forming, semi-evergreen perennial with ovate, mid-green leaves, heavily marked with silvery white spots. Dense clusters of funnel-shaped, magenta to coral flowers bloom on short stems in spring.

Rudbeckia fulgida var deamii (Deam's Coneflower)

Rudbeckia fulgida var deamii (Deam's Coneflower)

A clump-forming, herbaceous perennial with ovate, rough, dark-green leaves and upright, leafy stems bearing daisy-like, golden-yellow flowers from late summer to mid-autumn. Height 75cm (2.5ft), Spread 50cm (1.5ft).

Rudbeckia fulgida var. sullivantii 'Goldsturm'

Rudbeckia fulgida var. sullivantii 'Goldsturm'

A clump-forming, herbaceous perennial with rough, dark-green, ovate leaves and large black-eyed, single, yellow daisy flowers over a long-flowering season. Height 1m (3ft), Spread 60cm (2ft).

Rudbeckia fulgida var. sullivantii 'Little Goldstar'

Rudbeckia fulgida var. sullivantii 'Little Goldstar'

A compact, clump-forming, herbaceous perennial with dark green pinnate leaves &, from midsummer into autumn, upright stems bearing double, golden-yellow flowers with dark brown central cones. Height & Spread 50cm (1.5ft).

Salvia 'Amistad' (Sage)

Salvia 'Amistad' (Sage)

An upright, branching, woody-based perennial with ovate, hairy, toothed, aromatic, mid-green leaves and dark purple stems bearing whorled spikes of fragrant, two-lipped, dark purple flowers from early summer into autumn.

Salvia 'Flamingo'

Salvia 'Flamingo'

An aromatic perennial of a bushy habit with rosettes of broad green leaves and erect stems. Long lasting, large bright pink flowers in coral calyces throughout the summer into autumn. Height & Spread 1m (3ft).

Salvia 'May Night' (Wood Sage)

Salvia 'May Night' (Wood Sage)

An upright perennial with dark-green foliage and racemes of deep violet flowers in early summer. Height 1m (3ft), Spread 50cm (1.5ft).

Salvia 'Royal Bumble' (Sage)

Salvia 'Royal Bumble' (Sage)

An upright, bushy evergreen to semi-evergreen subshrub or shrubby perennial with aromatic, mid- to dark green leaves and, from late summer into autumn, dark purple stems bearing whorled, two-lipped, bright red flowers.

Salvia greggii 'Salmon Dance' (Sage)

Salvia greggii 'Salmon Dance' (Sage)

An upright, bushy, evergreen sub-shrub or woody-based perennial with aromatic, ovate, mid- to dark grey-green leaves and terminal racemes of lightly fragrant, two-lipped, pale salmon flowers from early summer into autumn.

Salvia nemorosa 'Caradonna' (Balkan Clary)

Salvia nemorosa 'Caradonna' (Balkan Clary)

A compact, clump-forming perennial with dark-green, toothed leaves. From summer through to early autumn, it bears spikes of violet-blue flowers on dark, upright stems. Height 75cm (2.5ft), Spread 50cm (1.5ft).

Salvia nemorosa 'East Friesland' (Balkan Clary)

Salvia nemorosa 'East Friesland' (Balkan Clary)

An upright, compact perennial with ovate leaves and deep violet-blue flowers with pink bracts in summer and autumn. Height & Spread 50cm (1.5ft).

Salvia nemorosa 'Ostfriesland' (Balkan Clary)

Salvia nemorosa 'Ostfriesland' (Balkan Clary)

An upright, compact perennial with ovate leaves and deep violet-blue flowers with pink bracts in summer and autumn. Height & Spread 50cm (1.5ft).

Salvia x jamensis 'Pink Lips' (Sage)

Salvia x jamensis 'Pink Lips' (Sage)

An upright, bushy, borderline hardy, semi-evergreen sub-shrub with small, ovate to elliptic, aromatic, dark green leaves and open racemes of two-lipped, pink and white flowers from summer into autumn.

Salvia x sylvestris 'Mainacht' (Wood Sage)

Salvia x sylvestris 'Mainacht' (Wood Sage)

An upright perennial with dark-green foliage and racemes of deep violet flowers in early summer. Height 1m (3ft), Spread 50cm (1.5ft).

Scabiosa columbaria (Small Scabious)

Scabiosa columbaria (Small Scabious)

An upright perennial with lobed leaves, and pale purple-blue flowes in summer and early autumn. Height 1m (3ft), Spread 50cm (1.5ft).

Schizostylis coccinea (Kaffir Lily)

Schizostylis coccinea (Kaffir Lily)

A vigorous, clump-forming perennial with narrow, bright green leaves and spikes of open, cup-shaped, scarlet flowers in autumn. Height 60cm (2ft), Spread 30cm (1ft).

Sedum 'Purple Emperor' (Stonecrop)

Sedum 'Purple Emperor' (Stonecrop)

A mound forming deciduous perennial with dark purple leaves and tall, purple-pink flowers in autumn. Height & Spread 50cm (1.5ft).

Sedum spectabile 'Autumn Joy' (Stonecrop)

Sedum spectabile 'Autumn Joy' (Stonecrop)

One of the finest of all upright Sedums. The umbrella-like flower heads are pink and change to a rosy red in autumn and contrasting with its green foliage. Height & Spread 50cm (1.5ft).

Sedum spectabile 'Brilliant' (Ice Plant)

Sedum spectabile 'Brilliant' (Ice Plant)

A perennial forming a clump with thick stems and broad elliptic, grey-green leaves and flat cymes of dark-centred, bright pink flowers. Height & Spread 50cm (1.5ft).

Sedum spectabile 'Herbstfreude' (Stonecrop)

Sedum spectabile 'Herbstfreude' (Stonecrop)

One of the finest of all upright Sedums. The umbrella-like flower heads are pink and change to a rosy red in autumn and contrasting with its green foliage. Height & Spread 50cm (1.5ft).

Sidalcea 'Sussex Beauty' (Prairie Mallow)

Sidalcea 'Sussex Beauty' (Prairie Mallow)

A mid-sized, upright, herbaceous perennial with rounded leaves at its base. In summer, it bears tall spikes of large, candy-pink flowers. Height 1m (3ft), Spread 60cm (2ft).

Stachys byzantina 'Silver Carpet' (Woolly Betony)

Stachys byzantina 'Silver Carpet' (Woolly Betony)

A mat forming perennial that is evergreen in mild climates, with oval, woolly, silver-grey leaves, but rarely has flowers. Height 50cm (1.5ft), Spread 1.2m (4ft).

Tiarella 'Pink Skyrocket' (Foam Flower)

Tiarella 'Pink Skyrocket' (Foam Flower)

A clump-forming, deciduous to semi-evergreen perennial bearing rosettes of mid- to dark green leaves with maroon-marked central veins and upright racemes of fluffy, pink flowers in late spring and early summer.

Tradescantia x andersoniana 'Bilberry Ice'

Tradescantia x andersoniana 'Bilberry Ice'

A tufted, clump-forming, evergreen perennial with branching stems bearing arching, slightly fleshy, dark green leaves and, from early summer into autumn, small clusters of 3-petalled, pale lavender-blue flowers.

Verbascum 'Gainsborough' (Mullein)

Verbascum 'Gainsborough' (Mullein)

A herbaceous perennial with semi-evergreen, grey-green foliage forming at the base of the plant. Tall spikes of pale-lemon flowers are produced in summer. Height 1.5m (5ft), Spread 50cm (1.5ft).

Verbascum olympicum (Olympian Mullein)

Verbascum olympicum (Olympian Mullein)

A tall, rosette-forming biennial or short-lived, evergreen perennial with large, woolly, silver-grey leaves and erect, woolly, silver-grey stems bearing bright golden- yellow flowers in late summer.

Verbena bonariensis

Verbena bonariensis

A herbaceous perennial that produces heads of bright purple flowers from June until October. Particularly effective if grown in a mass. Height 2.5m (8ft), Spread 50cm (1.5ft).

Verbena bonariensis 'Lollipop'

Verbena bonariensis 'Lollipop'

A stiff, compact, open clump-forming, herbaceous perennial with erect, branching stems bearing lance-shaped, dark green leaves and branched clusters of small purple flowers from midsummer to early autumn.

Veronicastrum virginicum 'Album' (Culver's Root)

Veronicastrum virginicum 'Album' (Culver's Root)

An upright herbaceous perennial. Its stems are clothed with worled leaves and in late summer, it bears narrow, upright spikes of white flowers. Height 1.2m (4ft), Spread 50cm (1.5ft).

Veronicastrum virginicum f. roseum (Pink Culver's Root)

Veronicastrum virginicum f. roseum (Pink Culver's Root)

A tall, erect, herbaceous perennial with whorls of lance-shaped, pointed, toothed, dark green leaves and, from midsummer into early autumn, slender, dense, terminal racemes of tubular, pale pink flowers.

Zantedeschia aethiopica 'Green Goddess' (Arum Lily)

Zantedeschia aethiopica 'Green Goddess' (Arum Lily)

A perennial suitable for ponds or bog gardens. It has white spathes, flushed green with yellow spadices held on tall stems above large dark-green leaves. Height 1m (3ft), Spread 50cm (1.5ft).


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