 You can do them just before it starts cooling off in mid-August. You can plant them. Most of your greens, with the exception of Swiss chard, are not going to be productive right now. It's just too hot. I've been seeing, I think it's Malabar spinach, in a couple places lately. That'll handle the heat. I don't remember who carried it, but you may find some of that, and that would be worth getting.