Astilbe 'Sprite' (simplicifolia hybrid): A shorter form of this popular perennial with panicles of pale pink flowers & dark green ferny leaves. Good for damp or shady spots. Hardy. Up to 30cm.

Calamintha nepeta 'Blue Cloud': Spikes of small, soft blue flowers above mounds of minty scented green leaves. Loved by bees and butterflies. Hardy. Up to 30cm.

Calamintha nepeta 'White Cloud': Spikes of small white flowers above mounds of minty scented green leaves. Loved by bees and butterflies. Hardy. Up to 30cm.

Campanula glomerata 'Alba' (White clustered bellflower): Tight clusters of white flowers on short stems above neat, mat-forming foliage. Height about 30cm. Hardy.

Geranium maculatum 'Album' (white spotted cranesbill): Clean white flowers over neat foliage. Great for establishing under trees and in shady areas.

Geranium maculatum 'Elizabeth Ann' (Spotted cranesbill 'Elizabeth Ann'): Pink flowers over dark, almost wine red leaves. Fully hardy. Height to 40cm.

Geranium Patricia = 'Brempat' (Cranesbill 'Patricia'): Masses of magenta flowers over fresh green foliage. Height to 30cm. Fully hardy.

Hosta 'Devon Green': Elegant hosta with tapering, dark green, fine-veined leaves. Lilac flowers in summer

Ophiopogon japonicus 'Silver Mist' (Mondo Grass 'Silver Mist'): Grass-like evergreen perennial with variegated strappy leaves. Lavender flower spikes in the summer followed by black berries. Hardy. Up to 30cm.

Ophiopogon planescapus 'Nigrescens' (Black lilyturf): Jet back strappy leaves and purplish flowers in mid-summer. Widely and rightly used in modern planting schemes against silvery plants and paving.