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Herbaceous Perennial

Actaea simplex (Atropurpurea Group) 'Mountain Wave'

baneberry 'Mountain Wave'

A clump-forming, herbaceous perennial to around 200cm in height, with dissected, bronze foliage. Slender, branched spikes of fragrant, fluffy, creamy-white bottlebrush-like flowers tinged with purple appear in summer to autumn, followed by black berries

Synonyms

Actaea atropurpureum 'Mountain Wave'

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Ultimate height

1.5–2.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Clay

Loam

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Partial shade

Aspect

East–facing or North–facing or West–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Ranunculaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Actaea are rhizomatous herbaceous perennials with compound leaves and small creamy-white flowers in short, erect, simple or branched terminal racemes, followed either by poisonous red, black or white berries, or by star-shaped clustered brown follicles
Name status: Accepted

How to grow

Cultivation

Best grown in cool, moist, reasonably fertile soil in partial shade but will tolerate most soils if enriched with organic matter. May need staking - see staking perennials for further information

Propagation

Propagate by seed sown in pots in a cold frame in autumn or by division in early spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Flower borders and beds

Pruning

Cut back after flowering or fruiting

Pests

Generally pest-free

Diseases

Generally disease-free

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