Armeria caespitosa (Juniper-Leaved Thrift)

An evergreen perennial with a compact, mat-forming habit. In late spring it bears pale-pink flowers above dark-green, needle-like leaves. Height 30cm (1ft), Spread 50cm (1.5ft).

Armeria maritima 'Abbey Deep Rose' (Thrift)

A compact, dense, tufted, evergreen perennial with stiff, grass-like, dark green leaves and slender, erect, stems bearing compact, rounded clusters of deep rose-pink flowers from spring into summer.

Armeria maritima 'Alba' (Thrift)

A clump-forming evergreen perennial with dense, needle-like leaves and erect, stiff stems, bearing compact clusters of round-headed, white flowers in late spring and summer. Height 20cm (8in), Spread 30cm (1ft).

Armeria maritima 'Armada Rose' (Thrift)

A compact, dense, tufted, evergreen perennial with stiff, grass-like, dark green leaves and slender, erect, stems bearing compact, rounded clusters of rose-pink flowers from spring into summer.

Dianthus 'Flutterby'

A compact evergreen perennial with grey-green leaves and, in summer, scented, single flowers which are magenta-pink with a thin white margin. Height & Spread 50cm (1.5ft).

Fragaria vesca (Woodland Strawberry)

A woodland perennial with bright green leaves and white flowers in spring, producing red strawberries in mid-summer. Height & Spread 50cm (1.5ft).

Helianthemum 'Cerise Queen' (Rock Rose)

A mat-forming, evergreen shrub with small green leaves and masses of double pink flowers with yellow centres from late spring to early summer. Height 30cm (1ft), Spread 60cm (2ft).

Hutchinsia alpina (Chamois Cress)

A low-growing, mat-forming evergreen perennial with dark-green foliage. In spring, it bears clusters of lightly scented, small white flowers. Height 10cm (4in), Spread 30cm (1ft).

Lithodora diffusa 'Heavenly Blue' (Purple Gromwell)

A low-growing, mat-forming evergreen shrub, bearing small, hairy leaves and abundant, small, bright blue flowers in spring and summer. Height 10cm (4in), Spread 50cm (1.5ft).

Primula auricula 'Black Jack' (Auricula)

A semi-evergreen, clump-forming, herbaceous perennial with powdery, pale grey leaves. It produces deep burgundy flowers with a white-rimmed yellow center from mid-spring through to summer. Height & Spread 30cm (1ft).

Primula auricula 'Lunar Eclipse' (Auricula)

A rosette-forming, evergreen perennial with powdery, fleshy, grey-green leaves and, throughout spring, fragrant, double, copper-orange flowers with yellow eyes. Height & Spread 30cm (1ft).

Primula auricula 'Purple Pip' (Auricula)

An evergreen perennial with rosettes of pale, greyish-green leaves. Clusters of deep red-purple, double flowers appear on short, upright stems in spring. Height & Spread 50cm (1.5ft).

Rhodanthemum 'Casablanca' (Moroccan Daisy)

A mound-forming, woody-based, evergreen perennial with softly hairy, finely divided, grey-green leaves and, from early spring into autumn, erect stems bearing white, daisy-like flowers with orange-brown central discs.

Sedum spathulifolium 'Cape Blanco' (Stonecrop)

A mat forming, evergreen, perennial with branching, fleshy stems bearing rosettes of brittle, spoon-shaped, powder blue and copper leaves. Flat clusters of short-stemmed, star-shaped, bright yellow flowers bloom in summer.