Castor Bean Gibsonii (Ricinus Communis Gibsonii) - The castor oil plant - Ricinus communis is a very useful tropical foliage plant. It is grown from seed annually, easily reaching 5 foot plus in one season. Tall and dramatic, this variety produces huge dark red leaves and stunning scarlet seed heads. For a tropical touch to your garden this majestic plant adds beautiful and interesting foliage and a colorful backdrop to other foliage and flowering plants.