We have found 22 plants that meet your criteria.

granny's bonnet
Aquilegia vulgaris var.stellata 'Black Barlow' (Barlow Series) granny's bonnet Striking dark purple, double flowers £7.49 Buy
granny's bonnet
Aquilegia vulgaris 'William Guinness' granny's bonnet Unusual purple-black flowers £7.49 Buy
clematis (group 3)
Clematis 'Black Prince' clematis (group 3) Beautiful deep purple flowers £12.99 Buy
clematis (group 3)
Clematis 'Warszawska Nike' clematis (group 3) Sumptuous deep purple flowers, £9.99 Buy
dahlia bulbs
Dahlia 'Karma Choc' ® dahlia bulbs Opulent chocolate-scented flowers £3.99 Buy
dusky cranesbill
Geranium phaeum dusky cranesbill Small, deep maroon flowers. Good for groundcover £7.49 Buy
dusky cranesbill
Geranium phaeum var. phaeum 'Samobor' dusky cranesbill Small, purple-black flowers. Good for damp... £7.49 Buy
spencer sweet pea seed Beaujolais
Lathyrus odoratus 'Beaujolais' spencer sweet pea seed Beaujolais... One of the darkest forms £1.89 Buy
lily bulb
Lilium 'Black Beauty' lily bulb Stunning dark red, turkscap flowers £3.99 Buy
black elder (syn. Black Beauty)
Sambucus nigra f. porphyrophylla 'Gerda' (PBR) black elder (syn. Black Beauty)... Dramatic purple foliage £10.99 Buy
nasturtium
Tropaeolum 'Black Velvet' nasturtium Sumptuous colouring £2.49 Buy
Crocus Special Offers
New Tulip collection Buy 30 tulips for £18.95 + get... NOW £0.00 Buy
New
spencer sweet pea Beaujolais
Lathyrus odoratus 'Beaujolais' spencer sweet pea Beaujolais One of the darkest forms £6.99 coming soon
Price Pruned
tree peony / tree paeony
Paeonia delavayi tree peony / tree paeony... Tree peony with deep, maroon flowers NOW £19.99 coming soon
double late tulip bulbs
Tulipa 'Black Hero' double late tulip bulbs Almost black double flowers £5.99 coming soon
parrot tulip bulbs
Tulipa 'Black Parrot' parrot tulip bulbs Dramatic, blackish-purple, cup-shaped flowers £3.99 coming soon
fringed tulip bulbs
Tulipa 'Curley Sue' fringed tulip bulbs Delicately fringed flower petals £4.99 coming soon
triumph tulip bulbs
Tulipa 'Havran' triumph tulip bulbs Darkest blackcurrant coloured blooms £4.99 coming soon
triumph tulip bulbs
Tulipa 'Negrita' triumph tulip bulbs A sturdy tulip with rich colour £2.99 coming soon
New
viridiflora tulip bulbs
Tulipa 'Night Rider' viridiflora tulip bulbs Amazing blue-purple petals flamed with grass-green £7.99 coming soon