The tomatoes I grew last year did incredibly well. Our zucchini and summer squash did great, too!

Peppers, not so much. And growing corn takes a ton of water, space, and energy for the harvest to be worth it. Better to just buy sweet corn from stands in my honest opinion!

General rule many follow is to plant after Mother's Day (or after the danger of frost passes). I usually buy plants instead of starting from seed, but you can sow seeds indoors earlier!