Siamese Cassia

Senna siamea, Fabaceae

Zones

10a–13b

Layer

Canopy

Lifespan

Perennial

Growth

Fast

Guild Roles

Nitrogen FixerShade Provider

Growing Conditions

Sun

Full Sun (optimal)

Water

Low

Soil pH

5.5 – 7.5

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

Apple-ring AcaciaFaidherbia albida

Nitrogen Fixation

BananaMusa acuminata

Nitrogen FixationWind Protection

Dwarf Cavendish BananaMusa acuminata

Nitrogen FixationWind Protection

Surinam CherryEugenia uniflora

Nitrogen FixationPest Deterrent

African MahoganyKhaya senegalensis

Nitrogen Fixation

Antagonistic Plants

DurianDurio zibethinus

Senna species produce allelochemicals that inhibit fruit tree growth and compete aggressively for nutrients

Star AppleChrysophyllum cainito

Senna produces compounds that inhibit growth of tropical fruit trees like star apple

Uses

Functions

Timber

Common Questions

What zones does Siamese Cassia grow in?

Siamese Cassia grows in USDA hardiness zones 10a through 13b.

Is Siamese Cassia a nitrogen fixer?

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

What are good companion plants for Siamese Cassia?

Good companions for Siamese Cassia include Apple-ring Acacia, Banana, Dwarf Cavendish Banana, Surinam Cherry, African Mahogany.

Design guilds with Siamese Cassia and see companion relationships visually.

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