University of Wisconsin-Madison | Botany Plant Growth Facilities

Botanical Garden

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Genus: Ricinus Species: communis Common Name: Castor Bean Family: Euphorbiaceae Order: Malpighiales Native: Tropical Africa Habit: Herbaceous Perennial Height: 5 to 40 feet Width: 2 to 6 feet Flowering Season: Summer to Fall Flower Color: Pink, red or yellowish white Propagation: Seed Zone: 8-11 Note:This plant has ornamental foliage along with poisonous seeds and plant parts. Castor Bean is suitable for borders, garden backgrounds or as a specimen. Prefers sunny to partly shady, moderately dry, well-drained, sandy-loam soil.