Castor seeds are the bet when it comes to all of this, castor plant is also botanically termed as ricinus communis. The plant finds its origin in east africa, but it also grows abundantly in the indian subcontinent and the mediterranean region. Nowadays, castor plants are grown as a crop in many american states as there is an increased demand for castor seeds or castor beans. Many households in america grow castor plants in their backyard or garden as it helps to keep the pests at bay.