We have found 69 plants that meet your criteria.

Monkshood ‘Aconitum Sparks Variety’ Deep violet hooded flowers on tall stems £6.99 coming soon
Angelica ‘Angelica gigas’ Tall, dramatic burgundy flowers £6.99 Buy
Price Pruned
Columbine ‘Aquilegia McKana Hybrids’ Bonnet-like flowers in a range of colours NOW £4.99 Buy
Price Pruned
Granny's Bonnet ‘Aquilegia vulgaris var. stellata Black Barlow’ Striking dark purple, double flowers NOW £4.99 Buy
Granny's Bonnet ‘Aquilegia vulgaris William Guinness’ Unusual purple-black flowers £5.49 Buy
Wild Ginger ‘Asarum europaeum’ Lustrous foliage for a shady corner £5.99 Buy
New England Aster ‘Aster novae-angliae Violetta’ Beautiful deep purple flowers £6.99 coming soon
Michaelmas Daisy ‘Aster novi-belgii Purple Dome’ Masses of violet-purple flowers in late summer £5.99 coming soon
Masterwort ‘Astrantia major Rubra’ Gorgeous plum-coloured flowers £5.99 Buy
Price Pruned
Masterwort ‘Astrantia major var. rosea’ Unusual, pale pink flowers NOW £5.99 coming soon
Clustered Bellflower ‘Campanula glomerata Superba’ Rich purple flowers in June £5.49 Buy
Price Pruned
Milky Bellflower ‘Campanula lactiflora Loddon Anna’ Soft lilac flowers on tall stems NOW £5.49 Buy
Price Pruned
Dalmatian Bellflower ‘Campanula portenschlagiana’ Vigorous and low-growing NOW £4.99 Buy
Foxglove ‘Digitalis purpurea’ A native foxglove £1.25 Buy
Price Pruned
Foxglove ‘Digitalis purpurea Excelsior Group’ Perfect for a cottage-style garden NOW £5.49 Buy
Price Pruned
Foxglove ‘Digitalis x mertonensis’ Towering spikes of carmine flowers NOW £5.49 Buy
Joe Pye Weed ‘Eupatorium purpureum Atropurpureum’ Majestic and late-flowering £5.49 coming soon
Balkan Cranesbill ‘Geranium macrorrhizum Bevan's Variety’ Magenta flowers. Perfect for suppressing weeds £5.99 coming soon
Dusky Cranesbill ‘Geranium phaeum’ Small, deep maroon flowers. Good for groundcover £5.99 Buy
Price Pruned
Dusky Cranesbill ‘Geranium phaeum Lily Lovell’ Iridescent saucers of purple flowers. Good for shade NOW £5.49 Buy