Clusterspike False Indigo

Amorpha herbacea

Native to:
United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Fabaceae
Genus:
Amorpha
Species:
Amorpha herbacea
USDA Symbol:
AMHE

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Shrub
Height:
100 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
may,jun,jul
Bloom Colors:
purple, blue
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

Nephopterix dammersi

Reported Fauna Sightings

Moths:Orgyia Ochsenheimer Butterflies:Common Buckeye (Junonia coenia), Julia butterfly (Dione vanillae), Pipevine Swallowtail (Battus philenor), Zebra Swallowtail (Eurytides marcellus)

Garden & Ecology Notes

Wildlife Value:
bees, butterflies, small mammals
Deer Resistant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts vigorously from root crown after fire. Common in fire-maintained longleaf pine ecosystems and depends on periodic burns to reduce woody competition.

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
5.5 - 7.0 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
Prefers open, sunny habitats

Propagation & Germination

Stratification:
Cold/moist stratification required — 30–60 days
Scarification:
Seed coat scarification required before sowing
Germination Time:
14–30 days
Notes:
Scarification by nicking seed coat or brief hot water treatment improves germination. Legume seeds have hard coats requiring physical or chemical breakdown.

The above propagation data sourced from Claude AI

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).

Source: Claude AI