This is a fast growing, suckering, colony forming plant with decidedly tropical looking foliage.Castor bean is very easy to grow; too easy, some might say. They have a tendency to self sow and new seedlings can pop up all summer long. This is one of the fastest growing plants in the world and becomes almost treelike in 3-4 months. It will need to be staked if grown where the wind can blow it over. Light: Full sun is best and grows grows fastest and largest with abundant water, but once it gets established, it can tolerate drought - it just won't grow as fast.