True Indigo

Indigofera tinctoria, Fabaceae

Zones

9–11

Layer

Shrub

Lifespan

Perennial

Growth

Moderate

Guild Roles

Nitrogen Fixer

Growing Conditions

Sun

Full Sun (optimal)

Water

Moderate

Soil pH

5.5 – 7.5

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Sweet CornZea mays var. saccharata

Nitrogen FixationBeneficial Insect Habitat

NaranjillaSolanum quitoense

Nitrogen Fixation

Tree TomatoSolanum betaceum

Nitrogen Fixation

KatukSauropus androgynus

Nitrogen FixationBeneficial Insect Habitat

Natal PlumCarissa macrocarpa

Nitrogen FixationPest Deterrent

Antagonistic Plants

Lemon BasilOcimum x citriodorum

True indigo produces alkaloids that can inhibit growth of sensitive herbs like lemon basil

Uses

Functions

Nitrogen FixationDye

Common Questions

What zones does True Indigo grow in?

True Indigo grows in USDA hardiness zones 9 through 11.

Is True Indigo a nitrogen fixer?

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

What are good companion plants for True Indigo?

Good companions for True Indigo include Sweet Corn, Naranjilla, Tree Tomato, Katuk, Natal Plum.

Design guilds with True Indigo and see companion relationships visually.

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