Hedera rhombea

RHS Plant Profile

Japanese ivy

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Synonyms

Hedera rhombea 'Japonica'
Hedera rhombea var. formosana
Hedera helix var. rhombea
Hedera rhombea var. rhombea
Hedera rhombea f. pedunculata

Climber Wall Shrub

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An evergreen climbing shrub with dark green, three-lobed foliage with prominent grey veining. Possibly, insignificant yellow-green flowers may appear in the autumn, following by round, black fruits. This species is native to Japan and Korea, and is a little more distinctive and attractive than some of our native UK hederas

Position

Full shade, Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.5-1 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Clay Loam Sand

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

Position

Full shade Full sun Partial shade

Aspect: East–facing or North–facing or South–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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Araliaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Climbing, Trailing
Potentially harmful: Harmful if eaten: skin irritant/allergen. Wear gloves and other protective equipment when handling. Pets (dogs, cats, rabbits, rodents): Harmful if eatenskin irritant/allergen. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Hedera are evergreen climbing shrubs clinging by aerial roots. Clusters of small yellow-green flowers are followed by usually black berries. Foliage of flowering shoots is often less deeply lobed than that of the sterile, climbing shoots
Name Status: Correct
Plant Range: Temp. E Asia

How to Grow

Cultivation

Tolerant of a range of soils and conditions but grows best in fertile, humus-rich well-drained alkaline soil in a sheltered spot. Ideal for patio containers, or as a houseplant. See hedera (ivy) cultivation

Propagation

Propagate by softwood cuttings at any time, semi-ripe or hardwood cuttings from late summer to late winter, layering or grafting at any time

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Houseplants
Patio and container plants
Low Maintenance
Banks and slopes
Flower borders and beds
Ground cover
Wall side borders

Pruning

Pruning group 11

Pests

May be susceptible to glasshouse red spider mite, scale insects, vine weevil and aphids

Diseases

May be susceptible to honey fungus (rarely) and a leaf spot