Zanzibariensis is a monster-sized castor bean from Zanzibar with green leaves over 2 feet across, purple-tinted stems, and upright branching growth to 10-15 feet in one season.
Sow 1 inch deep. Sprouts in 7-14 days; soaking 12-24 hours helps. Start indoors 4-6 weeks before last frost in peat or paper pots at 70-80°F, move outside after frost 24-48 inches apart in full sun, and expect flowers in 90-100 days.
