Thunberg's Lespedeza

Lespedeza thunbergii

Native to:
China, India, Japan, Korea, Nansei-shoto, Taiwan

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Fabaceae
Genus:
Lespedeza
Species:
Lespedeza thunbergii
USDA Symbol:
LETH4

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Subshrub
Height:
180 cm
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
aug,sep,oct
Bloom Colors:
pink, purple, magenta
Landscaping Shrub:
Yes

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)
Butterflies & Moths:
★☆☆☆☆ Documented Lepidoptera association (GBIF)
Caterpillars:
★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)

Host Plant for Caterpillars

black-headed fireworm (Sparganothis pilleriana), Porphyrosela desmodiella

Garden & Ecology Notes

Wildlife Value:
bees, butterflies, hummingbirds
Deer Resistant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts vigorously from crown after fire or hard pruning; often cut back to ground in late winter.

Soil Requirements

Soil Type:
well-drained, sandy or loamy soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to open, sunny slopes and grasslands

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Scarification:
Seed coat scarification required before sowing
Germination Time:
14–30 days
Notes:
Scarification improves germination; seeds have hard seed coat. Cold stratification beneficial but not always required.

The above propagation data sourced from Claude AI

ORGHPS Germination Guide: Sow @ 20C. Germinates within 3 months. Requires scarification. | Requires soaking 24-48 hrs; discard floaters.

Source: Ontario Rock Garden & Hardy Plant Society