Castor is C3 pathway plant that grows optimally at constantly high temperature levels of 20-26°C but can tolerate temperature levels between 0 to 40°C. In colder areas, it grows well if the summers are sufficiently warm. It is a pioneer plant that is growing in flood zones, abandoned farmland and along roads. About 500 mm of rain is required between planting and harvesting castor but it can grow in areas with lower as well as much higher rainfall. Depending on the variety it requires a 140 to 180 day growing season. Under severe water stress, no seeds are set and too high air humidity increases pest and mould problem. About 30 to 60% humidity is considered ideal.
What are the climatic conditions required for Castor?
