Hello. I've always done container gardens and using the same pots, soil, location, and watering schedule for my zucchini plant. This is the first year that my young zucchini are turning yellow when they are about 4 inches long. The white on the leaves is also a common problem. Yes, I do water at the base. The mulch around the bottom is cedar. We've had a lot of very hot days and I've been watering them heavily. Any suggestions why the zucchini aren't growing normally? Thank you