Achillea ptarmica 'Peter Cottontail' (Sneezewort 'Peter Cottontail'): White, double button-like flowers, ferny grey/green foliage. Prefers full sun and light soil. More compact and larger flowers than other forms. Hardy. Up to 45cm.

Anemone nemorosa (Wood anemone): Low growing, pure white anemone which flowers in early spring. Hardy. To 10cm

Catananche caerulea 'Alba' (Cupid's Dart (White)): Papery white flowers above slender grey-green foliage. Flower heads retains attractive form through winter. Prefers sun and good drainage.To 60cm.

Cenolophium denudatum (Seseli libanotis, Baltic parsley): Flat umbels of pretty white flowers in summer. Fine, filigree foliage. Great in borders, sun or part shade. Hardy. To 90cm

Centaurea montana 'Purple Heart' (Perennial cornflower 'Purple Heart'): Large white cornflower-like flowers with violet central markings. Loved by bees and butterflies. To 30cm.

Centranthus ruber 'Albus' (White Valerian): White panicles of white flowers in mid-late summer. Very easy, self-seeds. Perennial and hardy. To 60cm.

Gaura lindheimeri 'The Bride': Beautiful airy stems of white flowers in mid to late summer. Best in full sun, in well drained soil and a sheltered spot. Stems up to 1m.

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.

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

Lychnis coronaria 'Alba' (Rose campion (white)): Pure white flowers on tall silver stems above rosettes of silver leaves

Pulsatilla vulgaris 'Alba' (Pasque flower - white): Large cup shaped white flowers over soft ferny foliage. Thrives in sunny, well drained spots. To 40cm.

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.