We have found 12 plants that meet your criteria.

Price Pruned
Granny's Bonnet ‘Aquilegia caerulea’ A cottage garden favourite NOW £4.99 Buy
Columbine ‘Aquilegia Kristall’ Pure white bell-like flowers £5.49 Buy
Granny's Bonnet ‘Aquilegia vulgaris var. alba’ Pure white nodding flowers £5.49 Buy
Price Pruned
Daylily ‘Hemerocallis Ice Carnival’ Elegant, star-shaped, creamy white flowers NOW £5.49 Buy
Siberian Iris ‘Iris sibirica White Swirl’ White flowers with unusual, flared petals. Lovely beside water £5.99 Buy
Price Pruned
Bear's Breeches ‘Acanthus mollis’ Spectacular architectural plant with stunning flowers NOW £5.49 Buy
Sneezewort ‘Achillea ptarmica The Pearl’ Masses of snow-white, button flowers £5.99 Buy
Valerian ‘Centranthus ruber Albus’ Perfect for a seaside garden £5.99 Buy
Price Pruned
Daylily ‘Hemerocallis Gentle Shepherd’ Elegant, large ivory flowers NOW £5.49 Buy
Siberian Flag ‘Iris sibirica Butter and Sugar’ Large, white flowers. A lovely marginal plant for ponds £5.99 Buy
Horned Violet ‘Viola cornuta Alba Group’ Subtly-scented, pure white flowers £5.99 Buy
New
Yarrow ‘Achillea Mondpagode’ A tall late flowering variety £6.99 coming soon