The listing, Purple Castor Bean Seeds X10 has ended.
I've grown these in Michigan and South Texas, They can easily get over 7ft. tall in one summer from seeds. With fertilizer and perfect conditions they can reach 20ft, even in one Michigan summer. My neighbor did it. The leaves were the size of trashcan lids. But that was with exceptional care. Usually only 7+ with leaves bigger than a Frisbee. As far South as Texas, they look healthy year-round. Mine never even stopped blooming down here. They started growing again in February. I expect they will eventually get 20ft tall regardless of care down here in Texas, since they survive Winter and grow for years. As you can see in the photos, they are striking and very tropical looking. These turn heads. Your neighbors will stop to ask about them, I am sure. They make a great hedge or privacy screen in just 8-10 weeks. Full sun is best. (6+ hours of direct light per day)