The high temperatures we're bound to encounter can take their toll on spring and early summer vegetables. Tomatoes will set fewer flowers; snap beans will produce poorer quality beans. Conversely, with some vegetables... the hotter it gets, the better they do.
Remember that mid-summer gardening is different from gardening in the spring. You'll need to remember thorough irrigation to counter the summer's long stretches of hot, dry conditions.
When you're watering, though, you'll also want to avoid wetting the foliage, if you can. This helps reduce fungal infections. These fungi spores usually have to land on a wet leaf spot in order to take hold and infect the plant. So keep the leaves dry.
Mulch your beds with two inches of your favorite mulch. Free stuff like leaves or pine straw from trees around the yeard are great. Mulches help reduce weeds. You don't want weed seeds to catch any sun. Other benefits of mulch? Blocking sunlight from hitting the soil helps keep the soil from heating up. Cooler roots also help vegetables deal with summer heat. Additionally, mulch conserves moisture to prevent soil from drying out too fast.
Want heat tolerant vegetables? Try okra. Or southern peas. Cantaloupe, pumpkins, and watermelon are good for planting now, too.