2 (4)m, Palma Christi or Castor Oil Plant is a very fast growing tropical woody, African perennial, which is usually grown as an annual in colder regions for its very large, ornamental foliage. For any rich, well drained soil in full sun. Preferably sow large seeds under frostfree conditions in mid spring and transplant seedlings to the final spot in the garden after the last freezing nights by the end of spring to early summer. Note: All parts are poisonous. Not recommended for subtropical to tropical arid areas, where this species may become invasive. VII-IX.