Buy Anthriscus sylvestris 'Ravenswing' - 2Ltr £6.99

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Fully hardy - requires no frost protection.
(Purple cow parsley
)
Family Apiaceae
Originating from Europe, West Asia and North Africa
Deciduous, upright herbaceous perennial with deep purple foliage and dainty umbels of small white flowers with pink bracts.
Grow in free-draining soil in sun or light shade.
Eventual mature plant size :
Height 1m
Spread 30cm