Clusterspike False Indigo
Amorpha herbacea
- Native to:
- United States
iNaturalist: © eel_program (iNaturalist #11646317)






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