geranium leaves turning red
A couple of months ago I planted 150 Hybrid geraniums and around 300 paintbox geranium seeds. The plants are now between 3 and 6 inches tall but all of the leaves are turning red. I have always had such good luck planting geraniums until now. Can anyone tell me what is going on and what I can do to correct this problem. These are planted for a school project and I would hate to lose these if I can do something to help solve this problem. Thanks.