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False indigo

Amorpha

Also called Indigo Bush, False Indigos, Indigobush

False indigo
Photo: Jennifer Anderson., Public domain

Amorpha is a genus of native North American shrubs and small trees in the pea family, with the desert false indigo or indigo bush (Amorpha fruticosa) the most widely grown member. The key to growing them is a sunny, well-drained spot, as they are tough and tolerant of poor soil once established.

Family
Fabaceae (Pea & bean family)
Grows as
Shrub
Light
Full sun, Part shade
Water
Water regularly while young, then rely mostly on rainfall once established.
Soil
Tolerates a wide range of soils, including dry, sandy or clay soils, as long as drainage is reasonable.
Temperature
Hardy in cold winters; protect young plants from severe frost.
How easy
Easy

About

Amorpha is a genus of plants in the pea family, Fabaceae. All the species are native to North America, from southern Canada, most of the United States (US), and northern Mexico. They are commonly known as false indigo. The name Amorpha means "deformed" or "without form" in Greek and was given because flowers of this genus only have one petal, unlike the usual "pea-shaped" flowers of the Faboideae subfamily. Amorpha is missing the wing and keel petals.

The desert false indigo or indigo bush (Amorpha fruticosa), is a shrub that grows from 3 m to 5 m tall. The species is considered a rare species in the US state of West Virginia and in the Canadian provinces of Manitoba and Ontario, but is considered an invasive plant in some areas of the northeastern and northwestern United States and in southeastern Canada, beyond its native range, and has also been introduced into Europe.

Other Amorpha plants

California false indigo · Desert false indigo

Text excerpted from the Wikipedia article Amorpha by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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