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Spike Indigo

Indigofera spicata, Fabaceae

Zones
8–11
Layer
Shrub
Lifespan
Perennial
Growth
Moderate

Guild Roles

Nitrogen FixerMulch MakerDynamic Accumulator

Growing Conditions

Sun

Full Sun (preferred)Partial Shade (tolerated)

Water

Low (established)Moderate (seedling)

Soil pH

6 – 8

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Large-Bracted Hoary PeaTephrosia bracteolata
Nitrogen FixationPest Deterrent
Hawkweed-leaf wallflowerErysimum hieraciifolium
Nitrogen FixationPest Deterrent
Red BuckwheatEriogonum grande var. rubescens
Nitrogen FixationPollinator Sharing

Uses

Functions

Nitrogen FixationSoil ImprovementDye ProductionDeep Mining

Medicinal Uses

Anti-Inflammatory

Common Questions

What zones does Spike Indigo grow in?

Spike Indigo grows in USDA hardiness zones 8 through 11.

Is Spike Indigo a nitrogen fixer?

Yes, Spike Indigo is a nitrogen fixer and can help provide nitrogen to neighboring plants in a guild or polyculture.

What are good companion plants for Spike Indigo?

Good companions for Spike Indigo include Large-Bracted Hoary Pea, Hawkweed-leaf wallflower, Red Buckwheat.

Design guilds with Spike Indigo and see companion relationships visually.

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