We have found 36 plants that meet your criteria.

nasturtium
Tropaeolum 'Black Velvet' nasturtium Sumptuous colouring £2.49 Buy
red hook sedge
Uncinia rubra red hook sedge Wonderful deep bronzy-red foliage £7.99 Buy
dahlia bulbs
Dahlia 'Karma Choc' ® dahlia bulbs Opulent chocolate-scented flowers £3.99 coming soon
Price Pruned
Lenten Rose hellebore
Helleborus × hybridus 'Harvington Double Lime' Lenten Rose hellebore A gorgeous, new variety NOW £11.99 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
beard tongue
Penstemon 'Raven' beard tongue Dramatic, deep purple, foxglove-like flowers £7.99 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
viridiflora tulip bulbs
Tulipa 'Night Rider' viridiflora tulip bulbs Amazing blue-purple petals flamed with grass-green £7.99 coming soon
single late tulip bulbs
Tulipa 'Paul Scherer' single late tulip bulbs Possibly the darkest purple tulip £5.99 coming soon
single late tulip bulbs
Tulipa 'Queen of Night' single late tulip bulbs Velvety, dark maroon blooms £3.99 coming soon
New
spencer sweet pea Beaujolais
Lathyrus odoratus 'Beaujolais' spencer sweet pea Beaujolais One of the darkest forms £6.99 coming soon
lily bulb
Lilium 'Black Beauty' lily bulb Stunning dark red, turkscap flowers £3.99 coming soon