Q.Growing Beans in a Greenhouse
My beans seem to be growing fine in the greenhouse; I only have a few plants. However, the leaves seem to be changing to an almost yellow color. Can you tell me what is happening?
Certified GKH Gardening Expert
Is there enough air circulation in the greenhouse? If not, it could be due to excessive moisture. Excessive moisture is an ideal environment for the development of fungus as well. If a fungal infection has occurred, this could prove detrimental to the plants. While fungicides are available, timing of the disease is crucial in order to save the plants. Root rot can cause pole bean leaves to turn yellow. To check for root rot, carefully pull out one of your pole bean vines and check the roots. Healthy roots should be white.