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Polygonatum lasianthum (Japanese Solomon's seal)

Other names: Polygonatum petiolatum, Polygonatum taquetii, Polygonatum lasianthum var. coreanum, Mountain clapper lily

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Species
P. lasianthum is a rhizomatous, herbaceous perennial with long stems, arching toward the end, bearing oblong to elliptic, mid-green leaves and green-tipped, tubular, white flowers
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
0.6 m 0.6 m 2-5 years
1 ft 1 ft 2-5 years

Where to grow

Soil type
  • Chalky
  • Clay
  • Loamy
  • Sandy
Soil drainage
  • Moist but well-drained
Soil pH
  • Acid
  • Alkaline
  • Neutral
Sunlight
  • Partial Shade
  • Full Shade
Aspect
  • East
  • West
  • South
  • North
Exposure
  • Sheltered

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Additional plant details

Cultivation

Grow in fertile, humus-rich, moist but well-drained soil. Best in cool, dappled shade but tolerates full shade. Dislikes hot summers. In ideal growing conditions will slowly spread to form colonies.

Suggested uses

Flower Arranging, Beds and borders, Underplanting

UK hardiness

H6

USDA zones

Zone 5, Zone 6, Zone 7, Zone 8, Zone 9

Sunset zone

WUCOLS

North-Central Coastal = High
Central Valley = Inappropriate
South Coastal = Moderate/Medium
South Inland = Inappropriate
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Deciduous

Habit

Erect, Arching

Native to

Japan, Korea

Drought tolerant

No

Flood tolerant

No

Toxicity

Careful: All parts cause severe discomfort if eaten.

Plant care

Pruning

Cut back to the base in late autumn.

Propagation methods

Division

Propagation

Slow to establish after division.

Pests

Slugs

Sawflies

Diseases

Cut plants to ground level (optional)

Divide and replant in spring

Plant in moist but well-drained soil (autumn or spring)

Plant in full sun or partial shade (autumn or spring)

Plant in partial or full shade (autumn or spring)

Other plants

Plants in this Genus (0)

Polygonatum

Companion plants (0)

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