- One of the most notorious blosoms in the world, the Castor Bean provides an easy, fast growing shrubby border plant guarunteed to be a hit in your garden.
56-63 days. Castor Bean ricinus seeds grow one of the tallest, hardiest, and most notorious blooms in the world! Castor Bean ricinus seeds promise an unbelievable 72-144" tall plant ideal as a shrubby border in the back of the garden or just sown wildly. Castor Bean ricinus is easy to grow from seed and one of the most resilient and fastest growing plants in all of North America. Castor Bean ricinus is infamously toxic if ingested and is verified by the Guinness Book of World Records for being the world's most poisonous houseplant.