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Fabaceae family

Kirilow's Indigo Indigofera kirilowii

Kirilow's Indigo is an introduced perennial shrub, found in the lower 48 states. It grows to 3 ft.

More about this plant

Indigofera kirilowii is a species of flowering plant in the family Fabaceae, native to eastern, central and northern China, the Korean Peninsula, and Kyushu island of Japan. A deciduous, suckering shrub typically 75 cm (30 in) tall, it is hardy in USDA zones 5 through 7. The unimproved species and a white‑flowered "alba" selection are commercially available. Wikipedia →

Growing & care

USDA PLANTS · TRY
Conditions
Sources · Conditions
Cold hardiness (derived) — Hardiness
Hardiness
≥ zone 8 derived from its U.S. range
Size & form
Sources · Size & form
TRY Plant Trait Database (CC BY 4.0) — Height
USDA PLANTS — Lifespan
Height
3 ft
Lifespan
Perennial
In the garden
Herb layer — Sits in the herb of a layered food forest or polyculture.Open guide →
Nitrogen fixer — Fixes atmospheric nitrogen through root-nodule bacteria — builds soil fertility for itself and its neighbours, cutting fertiliser need.Open guide →
derived roles
Species characteristics from USDA PLANTS (public domain) + TRY (CC BY) — general guidance, not a guarantee for your exact site. Deer "browsing" is documented palatability, not a deer-proof claim.

Wildlife & pollinators

How pollinator value is scored →
❧ Caterpillar hosts ~4 caterpillar species

Indigofera supports ~4 caterpillar species.

Native butterfly & moth caterpillars are the base of the terrestrial food web — most songbirds rear their young almost entirely on them. As a host for native Lepidoptera this is a modest genus for introduced plants — native genera typically support far more.

Recorded feeding on Indigofera in North America, including:

Achalarus lyciades · Hoary Edge Anticarsia gemmatalis · owlet moth Dichomeris nenia · twirler moth Dichomeris rustica · twirler moth Erynnis funeralis · Funereal Duskywing Erynnis zarucco · Zarucco Duskywing
+ 2 more species →
Hemiargus ceraunus · Ceraunus Blue Metephestia simplicula · snout moth
Keystone count (genus-level) from Warren II 2026 (CC0) · Tallamy host-use records. Named species (a documented Nearctic sample, not exhaustive) from NHM HOSTS (CC0).
Species thumbnails re-hosted from iNaturalist — Creative Commons, credited per image (hover for credit). Click any species to see it on iNaturalist. Not exhaustive; many taxa have no openly-licensed photo yet.
Sources for this entry (15) Open & cited
[01] Scientific name & family — USDA PLANTS (DwCA, Zenodo 17903503)
[02] Growth habit & duration — USDA PLANTS (DwCA, Zenodo 17903503)
[03] Native status & distribution — USDA PLANTS (DwCA, Zenodo 17903503)
[04] Common name — USDA PLANTS (via GBIF)
[05] Invasive / introduced status — US-RIIS v2.0 (USGS)
[07] Description — Wikipedia (CC BY-SA)
[08] Ecological value — Warren II 2026 (CC0) · Tallamy host-use counts
[10] Cold hardiness (derived) — Derived from U.S. range × USDA PHZM zones
[11] Nitrogen fixation — Werner et al. 2014 (Dryad, CC0)
[13] Caterpillar host count — Warren II 2026 (Dryad, CC0) · Tallamy host-use counts
[14] Caterpillar species — NHM HOSTS (CC0)
[15] County range — GBIF Open Data — open-licensed occurrences (CC0/CC-BY) → county
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PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).

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