Ricinus communis, Castor bean

Castor bean                                                                                                   

Ricinus communis

Hardiness: Zones 9 to 11
Plant type: Annual 
Height: 6- 10'
Spread: 2-  4'
Sun: Full Sun
Water: Medium to dry
Bloom time: June to October
Bloom color: Greenish yellow
Soil: Rich, evenly moist, well-draining loam

Notes: Every part of this plant is poisonous if ingested, particularly the seeds which contain highly toxic ricin.

More information on this plant here.