Hydrangea petiolaris from Yakushima, Japan

Synonyms

Hydrangea anomala subsp. petiolaris from Yakushima

Climber Wall Shrub

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A miniature, self-clinging, deciduous climber to around 100cm in height, with small, heart-shaped dark green foliage, red-purple underneath. Flat, white lace cap flowers appear in the summer. Happy scrambling through borders, or climbing a tree, trellis or fence

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

1-1.5 metres

Size

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

Growing Conditions

Clay Loam Sand

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

Position

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: Hydrangeaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Climbing
Potentially harmful: Skin allergen. Wear gloves and other protective equipment when handling
Genus: Hydrangea can be deciduous or evergreen shrubs, or self-clinging climbers, with flowers in clusters usually comprising both small fertile and more showy sterile flowers; often good autumn colour
Name Status: Correct

How to Grow

Cultivation

Grow in any moist but well-drained soil in partial shade or grow in sun if soil remains reliably moist. Improve chalky soils with organic matter to support good growth. See climbing hydrangea cultivation

Propagation

Propagate by layering and softwood cuttings in early summer

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Climber and wall shrubs
Wall side borders

Pruning

Pruning group 11, after flowering

Pests

May be susceptible to aphids, hydrangea scale, capsid bug and glasshouse red spider mite

Diseases

May be susceptible to a leaf spot, powdery mildews, grey moulds (Botrytis) and honey fungus (rarely)