We have found 35 plants that meet your criteria.

Hyssop ‘Agastache Black Adder’ Distinctive violet, bottlebrush flowers £5.99 Buy
Price Pruned
Allium ‘Allium cristophii’ Huge globes of star-like, lilac flowers NOW £5.99 Buy
Allium ‘Allium hollandicum Purple Sensation’ Rich, deep purple globes £5.99 Buy
Price Pruned
Granny's Bonnet ‘Aquilegia vulgaris var. stellata Black Barlow’ Striking dark purple, double flowers NOW £4.99 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
Dusky Cranesbill ‘Geranium phaeum’ Small, deep maroon flowers. Good for groundcover £5.99 Buy
Price Pruned
Dusky Cranesbill ‘Geranium phaeum var. phaeum Samobor’ Small, purple-black flowers. Good for damp or dry shade NOW £5.49 Buy
Cranesbill ‘Geranium pratense Midnight Reiter’ Unusual deep purple foliage £5.99 Buy
Geranium ‘Geranium sylvaticum Birch Lilac’ Great for a woodland setting £5.99 Buy
Crocus Special Offers
Big Blue Lily-turf ‘Liriope muscari’ Purple, wand-like flowers and evergreen foliage NOW £5.99 Buy
Price Pruned
Bergamot ‘Monarda Ou Charm’ Pretty, pink flowers and purple bracts NOW £5.49 Buy
Catnip ‘Nepeta racemosa Walker's Low’ Long flowering period £5.99 Buy
Catmint ‘Nepeta x faassenii Kit Cat’ A dwarf variety with purple flowers £5.99 Buy
Oriental Poppy ‘Papaver orientale Patty's Plum’ Deep reddish-purple, pleated flowers £5.99 Buy
Jerusalem Sage ‘Phlomis tuberosa Amazone’ Whorls of lilac flowers and architectural seedheads £6.99 Buy
Phlox ‘Phlox paniculata Franz Schubert’ Wonderful, fragrant, lilac flowers £5.99 Buy
Verbena ‘Verbena bonariensis’ Lilac-purple flowers £5.49 Buy
Chives ‘Allium schoenoprasum’ Edible leaves and purple, button flowers £3.99 Buy
Price Pruned
Columbine ‘Aquilegia McKana Hybrids’ Bonnet-like flowers in a range of colours NOW £4.99 Buy