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Shrubs

Helwingia japonica

Japanese helwingia

A small shrub to about 1.5m which produces small green flowers in late spring directly from the centre of the leaf midribs. Male and female flowers are produced on separate plants and, if fertilised, the females produce pea-sized, black berries which contrast well with the yellow autumn foliage

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Ultimate height

1–1.5 metres

Time to ultimate height

5–10 years

Ultimate spread

1–1.5 metres

Loam

Sand

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: Helwingiaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Helwingia are medium-sized, evergreen or deciduous shrubs with shiny leaves in opposite pairs. The flowers are small and inconspicuous, male and female usually on different plants, and emerge in small clusters directly from the leaf midribs, followed by red or black berries
Name status: Correct
Plant range: China, Japan

How to grow

Cultivation

Grow in light, humus-rich soil in light shade

Propagation

Propagate by seed or by softwood cuttings

Suggested planting locations and garden types

Cottage and informal garden
Low Maintenance

Pruning

Pruning group 1

Pests

Generally pest-free

Diseases

Generally disease-free

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