We have found 16 plants that meet your criteria.

Price Pruned
Aquilegia vulgaris var. 'stellata Black Barlow' Granny's Bonnet Striking dark purple, double flowers NOW £5.49 Buy
Geranium phaeum Dusky Cranesbill Small, deep maroon flowers. Good for groundcover £5.99 Buy
Price Pruned
Geranium phaeum var. 'phaeum Samobor' Dusky Cranesbill Small, purple-black flowers. Good for damp... NOW £5.49 Buy
Hemerocallis 'American Revolution' Day Lily Large, deep blood-red flowers in summer £5.99 Buy
Paeonia delavayi Tree Peony / Tree Paeony... Tree peony with deep, maroon flowers £16.99 Buy
Rudbeckia occidentalis 'Green Wizard' Black-eyed Susan Bright green sepals with black centres £5.99 Buy
Sambucus nigra 'Gerda' Black Elder (syn. Black Beauty)... Dramatic purple foliage £8.99 Buy
Trillium cuneatum little sweet Betsy Big maroon petals £3.00 Buy
Crocus Special Offers
Tulipa 'Black Jewel' fringed tulip A tall, very dark coloured tulip NOW £3.75 Buy
Tulipa 'Black Parrot' parrot tulip Dramatic, blackish-purple, cup-shaped flowers £5.00 Buy
Tulipa 'Curley Sue' fringed tulip Delicately fringed flower petals £4.00 Buy
Tulipa 'Havran' triumph tulip Darkest blackcurrant coloured blooms £3.00 Buy
Crocus Special Offers
Tulipa 'Queen of Night' single late tulip Velvety, dark maroon blooms NOW £1.50 Buy
Aquilegia vulgaris 'William Guinness' Granny's Bonnet Unusual purple-black flowers £5.49 Buy
Price Pruned
Clematis 'Warsaw Nike' Clematis (Group 3) Sumptuous deep purple flowers, NOW £7.99 Buy
Price Pruned
Uncinia rubra Red Hook Sedge Wonderful deep bronzy-red foliage NOW £5.99 Buy