We have found 34 plants that meet your criteria.

Bugbane (syn. Cimicifuga) ‘Actaea simplex Atropurpurea Group’ A late-flowering perennial for shade £8.99 Buy
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Bugbane (syn. Cimicifuga) ‘Actaea simplex Brunette’ Tall, dramatic flower spikes in early autumn NOW £12.99 Buy
Bugbane (syn. Cimicifuga) ‘Actaea simplex Pink Spike’ Dramatic pink flower spikes in autumn £5.99 Buy
Price Pruned
Bugle ‘Ajuga reptans Atropurpurea’ Good groundcover for shade NOW £3.99 Buy
Price Pruned
Bugle ‘Ajuga reptans Catlin's Giant’ Handsome evergreen ground cover NOW £4.99 Buy
Cow Parsley ‘Anthriscus sylvestris Ravenswing’ Lacy purple foliage with a sprinkling of white flowers £6.99 Buy
Aster ‘Aster lateriflorus Lady in Black’ Masses of tiny, pink-tinged daisies £5.99 Buy
White Snakeroot ‘Eupatorium rugosum Chocolate’ A late-flowering perennial with lovely, dark foliage £5.99 Buy
Cranesbill ‘Geranium pratense Midnight Reiter’ Unusual deep purple foliage £5.99 Buy
Golden Groundsel ‘Ligularia dentata Britt Marie Crawford’ Handsome foliage and cheerful, yellow flowers. Great beside water £6.99 Buy
Switch Grass ‘Panicum virgatum Rehbraun’ Fabulous autumn colour £5.49 Buy
Black-leaved Plum ‘Prunus cerasifera Nigra’ Purple leaves and white blossom in spring. £34.99 Buy
Rodgersia ‘Rodgersia pinnata Chocolate Wing’ Rich chocolate brown leaves are produced in the spring. £5.99 Buy
Black Elder (syn. Black Beauty)... ‘Sambucus nigra Gerda’ Dramatic purple foliage £8.99 Buy
Price Pruned
Japanese Maple ‘Acer palmatum Atropurpureum’ An elegant, small tree NOW £13.99 Buy
Price Pruned
Japanese Maple ‘Acer palmatum var. dissectum Atropurpureum Group’ A compact tree with feathery, purple leaves NOW £15.99 Buy
Price Pruned
Japanese Maple ‘Acer palmatum var. dissectum Crimson Queen’ Feathery, red-purple leaves and good autumn colour NOW £15.99 Buy
Price Pruned
Japanese Maple ‘Acer palmatum var. dissectum Inaba-shidare’ Spectacular burgundy leaves that turn crimson in autumn NOW £15.99 Buy
Price Pruned
Norway Maple ‘Acer platanoides Crimson King’ A large handsome tree with attractive foliage NOW £37.99 Buy
Price Pruned
Norway Maple ‘Acer platanoides Crimson Sentry’ Interesting tree due to its habit NOW £37.99 Buy