It's still not too late to get your second season or late Summer garden in. We're very luck here in the Southwestern states to be able to have summer vegetables all they way up to Thanksgiving. I've even grown zucchini, spaghetti squash, tomatoes and bell peppers up until January.
If you're worried about your plants not producing fast enough there are plenty of early producing vegetable varieties available. For instance, Bantan corn produces in about 80 days, an early corn variety called Early on Deck produces cobs in 60 - 65 days.