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Zanzibariensis Castor Bean

A monster-sized castor bean. This variety is from Zanzibar, reaching over 12-15 feet in one season with green leaves that grow to over 2 feet across and purple-tinted stems.  

15 seeds 



Ricinus communis


Germination: 7-14 days, soaking seeds for 12-24 hours aids in the germination.

Seed Planting Depth: 1" deep

Starting Indoors: Start indoors 4-6 weeks before the last frost. Provide 70-80ºF soil temperature. Using peat, cow, or paper pots can help with the stress of transplanting, they grow delicate roots and successful transplanting can be challenging. Transplant into the garden after the last frost. Water seedlings regularly until established. 

Outside Sowing: Only in zones 8-10

Growth Habit: Upright and branching

Height and Width: 10-15 feet

Spacing:24-48" apart

Light Needs:  Full sun

Soil Needs:  Loose, rich, well-drained. The richer the soil the larger the plants will grow

Approximate days to flower from seed:  90-100 days

Uses: Adds a tropical look to gardens, impressive quick growth for filling in garden spaces.

Care:  Mix compost or well-rotted manure into the soil before transplanting. Seeds are poisonous and cutting the flowers stalks before or after they bloom can keep the plants from self-seeding, especially in areas above zone 8.

Customer Reviews

Based on 5 reviews Write a review
Customer Reviews
5.0 Based on 4 Reviews
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Zay O.
United States
I recommend this product
Easy to grow

Quick fast delivery. Looking forward to my order

karen a.
United States United States
I recommend this product
caastor bean seeds

i love shopping at pinetree, they are still growing

Maria W.
United States United States
I recommend this product
Zanzaibariensis Castor Bean

This is review is for castor beans bought and planted in 2019. Arrived promptly as always. 100% germination and beautiful plant.

christopher s.
United States
Customer Review.

Excellent! Positively excellent. Nothing to note to improve. Attentive service. A+ seeds. ~98% germination. After 11 years of operating my own business, PineTree Seeds are truely one of my most dependable suppliers.