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Herbaceous Perennial

Geranium shikokianum

Japanese marbled cranesbill

A clump-forming herbaceous perennial, 20-40cm high, with deciduous, five-lobed or seven-lobed leaves, 5-10cm across, the lobes divided and toothed, marbled matt light and mid green above and shiny light green below, and open-funnel-shaped soft pink flowers, 2.5-3cm across, with large white centres and a network of fine purple veins, from midsummer to early autumn

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Partial shade

Aspect

North–facing or West–facing or South–facing or East–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: Geraniaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Geranium can be annuals, biennials and perennials, herbaceous or evergreen, with rounded, usually palmately lobed or divided leaves, and lax inflorescences of rounded, 5-petalled flowers
Name status: Correct
Plant range: S Japan, Korea

How to grow

Cultivation

Grow in light shade in moisture-retentive but well-drained soil

Propagation

Propagate by seed, sown in containers outdoors as soon as seed is ripe or in spring, or by division in spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Underplanting of roses and shrubs
Flower borders and beds

Pruning

No pruning required, but cutting back flowered stems and old leaves may encourage the growth of fresh leaves and flowers

Pests

Generally pest-free, but may be susceptible to capsid bug, geranium sawfly, vine weevil, slugs and snails

Diseases

Generally disease-free, but may be susceptible to a rust, downy mildews, leafy gall, and virus diseases; may also be susceptible to powdery mildews in dry conditions

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