Midday wilting is normal behavior on hot days and nothing to be concerned about, especially with peppers. Peppers are native to hot climates so they can take it. If your plants are wilting because they need water, they wouldnÃ¢â‚¬â„¢t stand up again when it cools off. If you want your peppers to be as hot as they can be, only water them when they show you they need it. Regularly watering pepper plants as if theyÃ¢â‚¬â„¢re thirsty tomato plants will make them produce less intense fruits.