Castor Bean

Ricinus communis, Euphorbiaceae

Zones

9–11

Layer

Shrub

Lifespan

Annual

Growth

Fast

Guild Roles

Pest Confuser

Growing Conditions

Sun

Full Sun (optimal)

Water

Low

Soil pH

5 – 8

Tolerances

Drought

Frost

Heat

Pest Resistance

Disease Resist.

Companion Plants

NaranjillaSolanum quitoense

Trap CropPest Deterrent

Vogel TephrosiaTephrosia vogelii

Pest DeterrentBeneficial Insect Habitat

Antagonistic Plants

ChayaCnidoscolus aconitifolius

Castor bean produces allelopathic compounds and competes aggressively for nutrients with chaya

Sweet CornZea mays var. saccharata

Castor bean produces ricin and other toxic compounds that can inhibit corn growth and development

Baby CornZea mays var. rugosa

Castor bean's toxic compounds negatively affect corn varieties including baby corn

ChicoryCichorium intybus

Castor bean's toxic compounds can suppress chicory growth and development

Siberian GinsengEleutherococcus senticosus

Castor Bean's toxic compounds inhibit Siberian Ginseng growth in temperate zones

Uses

Functions

OilPest Deterrent

Common Questions

What zones does Castor Bean grow in?

Castor Bean grows in USDA hardiness zones 9 through 11.

What are good companion plants for Castor Bean?

Good companions for Castor Bean include Naranjilla, Vogel Tephrosia.

Design guilds with Castor Bean and see companion relationships visually.

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