And yet apparently it's a problem: https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants/castor-bean-plant And.... It is toxic to humans, capable of causing serious illness and death. Flowers, leaves and especially the seeds are poisonous. Eating castor oil plant causes: https://weeds.dpi.nsw.gov.au/Weeds/CastorOilPlant#:~:text=It%20is%20toxic%20to%20humans,in%20the%20throat%20and%20mouth