Viburnum opulus var. americanum

RHS Plant Profile

highbush cranberry

Other common names

American cranberry bush, cranberry bush

Synonyms

Viburnum americanum misapplied
Viburnum trilobum

Shrubs

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A bushy, deciduous shrub to 4m, with maple-like, 3-lobed, dark green leaves, differing from others in the species by the long terminal lobe, with brilliant purple-red tints in autumn. Flat clusters of lacecap-like flowers, composed of tubular white fertile flowers surrounded by larger white sterile flowers in late spring and early summer, followed in midsummer by translucent bright red fruits persisting into winter

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

2.5-4 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 10–20 years
Max Spread: 1.5-2.5 metres
Max Height: 2.5-4 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

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): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Viburnaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: Fruit are ornamental - not to be eaten. Wear gloves and other protective equipment when handling. Pets: Fruit are ornamentalnot to be eaten - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Viburnum can be deciduous or evergreen shrubs with opposite, simple or palmately lobed leaves and clusters of small, often fragrant white or pink flowers, followed by red, blue or black berries
Name Status: Correct
Plant Range: N America

How to Grow

Cultivation

Grow in moderately fertile, humus-rich, moist but well-drained soil in sun or part shade. See viburnum cultivation for further advice

Propagation

Propagate by seed, sown in a cold frame in autumn, by softwood cuttings in summe

Suggested planting locations and garden types

Coastal
Cottage and informal garden
Wildlife gardens
Flower borders and beds
Hedging and screens

Pruning

Pruning group 1 after flowering unless fruit is required

Pests

May be susceptible to aphids and viburnum beetle

Diseases

May be susceptible to Phytophthora, honey fungus, grey moulds and leaf spot