We have found 33 plants that meet your criteria.

Price Pruned
Yarrow ‘Achillea millefolium Lilac Beauty’ An unusual lilac, yarrow NOW £5.49 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
Erigeron ‘Erigeron Dunkelste Aller (Darkest of All)’ Large dark violet daisies £6.99 Buy
Field Scabious ‘Knautia arvensis’ A great nectar source for butterflies £1.25 Buy
Price Pruned
Bergamot ‘Monarda Ou Charm’ Pretty, pink flowers and purple bracts NOW £5.49 Buy
Catmint ‘Nepeta x faassenii Kit Cat’ A dwarf variety with purple flowers £5.99 Buy
Phlox ‘Phlox paniculata Franz Schubert’ Wonderful, fragrant, lilac flowers £5.99 Buy
New
Salvia ‘Salvia nemorosa Amethyst’ Lilac-purple spires of flowers £5.99 Buy
Price Pruned
Meadow Rue ‘Thalictrum aquilegiifolium Thundercloud’ Plumes of lilac-purple flowers NOW £5.99 Buy
Meadow Rue ‘Thalictrum delavayi’ Mauve-blue flowers purple stems £5.49 Buy
Michaelmas Daisy ‘Aster novi-belgii Purple Dome’ Masses of violet-purple flowers in late summer £5.99 Buy
Michaelmas Daisy ‘Aster sedifolius nanus’ A small plant that has big impact £5.99 Buy
Masterwort ‘Astrantia major Rubra’ Gorgeous plum-coloured flowers £5.99 Buy
Bats-in-the-belfry ‘Campanula trachelium’ Common native hedgerow plant £1.25 Buy
Cardoon ‘Cynara cardunculus Cardy’ A fabulous architectural plant £5.99 Buy
Foxglove ‘Digitalis purpurea’ A native foxglove £1.25 Buy
Price Pruned
Gay Feather ‘Liatris spicata Kobold’ Magenta, bottlebrush-like flowers NOW £5.49 Buy
Giant Catmint ‘Nepeta grandiflora Wild Cat’ A giant catmint with deep purple-blue flowers £5.99 Buy
Price Pruned
Beard Tongue ‘Penstemon Raven’ Dramatic, deep purple, foxglove-like flowers NOW £5.49 Buy