Alchemilla mollis (Lady's mantle): Bright green soft leaves and a froth of acid yellow/green flowers in summer. Very easy for ground cover

Corydalis elata: Summer flowering Corydalis with bright blue flowers above soft green foliage. Excellent in some shade in moist soil. Hardy. Up to 30cm.

Epilobium angustifolium 'Album' (White Rosebay Willowherb. Syn. Chamaerion angustifolium 'Album'): Slender spires of white flowers in late summer. To 1.8m. Hardy. [Collect Only]

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

Geranium phaeum 'Album' (Dusky cranesbill 'Album'): Clean white flowers held above bright green foliage. Excellent in shade. Spreading habit. Hardy. Height to 60cm.

Geranium x oxonianum 'Claridge Druce': Long flowering vigorous geranium with pale pink flowers with cerise pink veins. Good for ground cover. Hardy. Up to 50cm.

Hosta 'Blue Mouse Ears': A small form of Hosta with smooth rounded blue-grey leaves and soft purple flowers in the summer. Hardy. Up to 50cm.

Hosta 'Empress Wu' (PBR): One of the largest leaved Hostas in cultivation - possibly the largest. Leaves up to 18" across when established. [Collect Only]

Hosta 'June': A popular cultivar. Glaucous blue green heart-shaped leaves with yellow-green variegation in the leaf centre. Purple flowers. Hardy. Up to 50cm.

Hosta 'Krossa Regal': A robust variety with tall grey-green leaves with deep veins. Lilac flowers in mid-summer. Also good in containers. Hardy. Up to 1m. [Collect Only]

Rodgersia pinnata 'Chocolate Wing': Fluffy panicles of pale pink flowers in mid-summer. Large, deeply divided leaves open bronze, in spring, retaining chocolate hue into autumn. [Collect Only]

Thalictrum delavayi 'Album' (Chinese meadow rue 'Album'): Dainty cup-shaped white flowers held high above fern-like greyish green leaves. To 1.2m. Hardy

Thalictrum delavayi 'Hewitt's Double' (Chinese meadow rue 'Hewitt's Double'): Tiny purple pom-pom flowers dance airily above ferny grey-green foliage. Height to 1.2m. Hardy [Collect Only]

Vinca minor 'Atropurpurea' (Small periwinkle 'Atropurpurea'): A compact mat-forming evergreen perennial with trailing stems of dark green leaves and dark purple flowers. Good in shade. Hardy ground cover.

Vinca minor f. alba 'Gertrude Jekyll' (Small white periwinkle 'Gertrude Jekyll'): A compact mat-forming evergreen perennial with trailing stems of dark green leaves. White flowers from mid spring to autumn.