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BogsHerbaceous Perennial

Bistorta amplexicaulis 'Blackfield'^PBR

red bistort 'Blackfield'

A compact, clump-forming perennial to 90cm with dark green, oval to heart-shaped leaves to 10cm long. Long-stalked, narrow spikes of dark blood-red flowers open from almost black buds from mid-summer to mid-autumn. Suitable for smaller gardens and at the front of a flower border

Synonyms

Bistorta 'Blackfield'
Persicaria amplexicaulis 'Blackfield'

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Clay

Loam

Moisture

Moist but well–drained, Poorly–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

North–facing or West–facing or South–facing or East–facing

Exposure

Exposed or 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: Polygonaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: A genus of herbaceous, rhizomatous perennials with erect, unbranched stems, bearing short terminal spikes of small, white or pink, bell-shaped flowers
Name status: Accepted

How to grow

Cultivation

Grow in any moist soil in full sun. Benefits from added organic matter

Propagation

Propagate by division in spring or autumn

Suggested planting locations and garden types

Cottage and informal garden
Wildflower meadow
Wildlife gardens
Flower borders and beds

Pruning

No pruning required. Cut back after flowering, or in late winter/early spring

Pests

Generally pest-free

Diseases

Generally disease-free

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