Ideal Temperature for Castor bean
Images of Castor bean
Signs of Cold Stress in Castor bean
Symptoms
Castor bean tolerates cold well and flourishes optimally when temperatures exceed 68℉. In winter, it needs to be maintained above 50℉. If temperatures drop below 32℉, while winter might show no immediate effects, spring could see reduced or absent sprouting.
Solutions
In spring, remove any sections that have not sprouted.
Signs of Heat Stress in Castor bean
Symptoms
In summer, Castor bean should be kept below 77℉. When temperatures go above 95℉, the plant's leaves might lighten, curl, become prone to sunburn, and in severe instances, the whole plant could wilt and dry out.
Solutions
Remove any parts that are sunburned and dried. Relocate the plant to a spot offering protection from midday and afternoon sun, or use a shade cloth. Water the plant in the morning and evening to maintain soil moisture.
