We have found 18 plants that meet your criteria.

Cow Parsley ‘Anthriscus sylvestris Ravenswing’ Lacy purple foliage with a sprinkling of white flowers £6.99 Buy
Columbine ‘Aquilegia Kristall’ Pure white bell-like flowers £5.49 Buy
Greater Sea Kale ‘Crambe cordifolia’ Huge dark green leaves and fluffy white flowers £5.49 Buy
Price Pruned
Sea Kale ‘Crambe maritima’ A profusion of delicate, white summer flowers NOW £5.99 Buy
Bleeding Heart ‘Dicentra Ivory Hearts’ Compact variety with ivory lockets £5.99 Buy
Gaura ‘Gaura lindheimeri’ White, star-shaped flowers and long season £5.49 Buy
Gaura ‘Gaura lindheimeri Whirling Butterflies’ Long-lasting, white flowers. Copes with drought £5.49 Buy
Price Pruned
Bowman's Root ‘Gillenia trifoliata’ Charming, star shaped white flowers NOW £5.49 Buy
Christmas Rose ‘Helleborus niger’ Bowl-shaped, white flowers in the depths of winter £5.49 Buy
Libertia ‘Libertia grandiflora’ Great for a gravel garden £5.99 Buy
Wildflower Border Collection ‘Wildflower Seeds Border Collection’ A collection of native wildflowers £2.99 Buy
Cottage Garden Collection ‘Cottage Garden Collection’ Create your own cottage garden £2.99 Buy
Price Pruned
Bleeding Heart ‘Dicentra spectabilis Alba’ Arching sprays of delicate, heart-shaped white flowers NOW £5.49 Buy
Harvington Hellebore ‘Helleborus x hybridus Harvington Speckled White’ Great illuminating a shady spot £9.99 Buy
Oriental Poppy ‘Papaver orientale Perry's White’ A pure white oriental poppy £5.99 Buy
Common Solomon's Seal ‘Polygonatum × hybridum Striatum’ Arching stems with bell shaped flowers. Great for woodland. £6.99 Buy
Common Solomon's Seal ‘Polygonatum x hybridum’ Creamy white flowers blue-black berries £6.99 Buy
Horned Violet ‘Viola cornuta Alba Group’ Subtly-scented, pure white flowers £5.99 Buy