Ideal Temperature for Rehmannia
Images of Rehmannia
Signs of Cold Stress in Rehmannia
Symptoms
Rehmannia exhibits moderate resilience to cooler temperatures and flourishes optimally when temperatures exceed 68℉. Throughout the winter, it should be maintained above 59℉. Should the temperature drop below 50℉, the foliage might begin to sag. In minor instances, recovery is possible, but in severe cases, leaves will wither and eventually detach.
Solutions
Remove any parts damaged by frost. Before subsequent exposure to low temperatures, cover the plant with materials like non-woven fabric or cloth, and build a windbreak to shield it from cold gusts.
Signs of Heat Stress in Rehmannia
Symptoms
In the summer, Rehmannia ought to be kept below 77℉. When temperatures surpass 86℉, the foliage's hue lightens, leaf tips might become parched and shriveled, leaves could curl, and the plant's vulnerability to sunburn increases.
Solutions
Prune off any parts that are sunburned and dried out. Relocate the plant to an area offering protection from the midday and afternoon sun, or deploy a shade cloth to provide cover. Irrigate the plant in the morning and evening to maintain soil moisture.
