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Shrubs

Berberis × interposita 'Wallich's Purple'

A densely, mound-forming evergreen shrub about 1.5m tall, with arching spiny stems, and mid-green leaves to 2.5cm long, grey-green beneath and bronze-purple when young. Clusters of yellow flowers in late spring are followed by blue-tinged black fruits

Synonyms

Berberis gagnepainii 'Purpurea'
Berberis gagnepainii 'Wallich's Purple'

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Ultimate height

1–1.5 metres

Time to ultimate height

5–10 years

Ultimate spread

1.5–2.5 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained, Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

East–facing or North–facing or South–facing or West–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: Berberidaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Spreading branched
Potentially harmful: Fruit are ornamental - not to be eaten. Wear gloves and other protective equipment when handling. Pets: Fruit are ornamental - not to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Berberis can be deciduous or evergreen shrubs with spiny shoots bearing simple, often spine-toothed leaves, and small yellow or orange flowers in axillary clusters or racemes, followed by small berries
Name status: Accepted

How to grow

Cultivation

Tolerant of a range of soils and locations, but grows best in any well drained soil in full sun or partial shade, though flowering and fruiting are best in full sun. See berberis cultivation for further advice

Propagation

Propagate by semi-ripe cuttings in summer

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Wildlife gardens
Low Maintenance
Hedging and screens

Pruning

Pruning group 8; trim hedges after flowering

Pests

May be susceptible to powdery mildews and sometimes by honey fungus

Diseases

May be susceptible to aphids and berberis sawfly

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