Geranium himalayense 'Derrick Cook' (Cranesbill 'Derrick Cook'): Large white flowers with delicate purple veining above a clump of bright green leaves. Foliage turns red in autumn. To 35cm. Hardy. [Collect Only]

Geranium macrorrhizum 'Album' (Rock cranesbill 'Album'): Superb ground cover Geranium especially for dry shade. White flowers with definite hint of pink. Aromatic foliage. Hardy. To 30cm.

Valeriana officinalis (Common valerian): Tall perennial with branched stems of tiny, soft white/pale pink flowers in early summer. Ferny, foliage. Hardy. Up to 1.2m. [Collect Only]

Viola cornuta Alba Group (Viola white flowered): Pure white flowers, bright green foliage. Excellent for ground cover in shade