Our castor bean plants used to stop traffic, as folks would inquire about what the plant was. We loved them, until my neighbor planted some of the seeds we collected. We didn't realize that the two dogs she owned were watching her. Soon after, they dug up and ate the seeds, causing both dogs to become so ill they almost perished. It took a lot of money to get them healthy again. I shiver when I think what this plant could do to a youngster. If you want to grow them, be certain there are no dogs or children at risk. I don't grow them anymore, because of the danger. They are beautiful, however! Corpus Christi, Tx.
I have grown Castor Beans for years, although I have had a dog and children. My policy for all is to not graze among the flowers, in any form, since lots of plants, including houseplants, are poisonous to some degree. There has never been a mishap. Note: The U.S. Botanic Garden Bartholdi Park has grown Castor Beans. They reseed and some are allowed to grow every year. JUST DON'T EAT THE PLANTS!