4. Water and mulch your peppers.
Throughout the growing season, make sure your pepper plants receive at least an inch of water a week. Check the peppers often during periods of extreme heat and drought, when each plant can easily take a gallon of water a day. If you live in a very hot, arid region, add a thick layer of organic mulch to help retain soil moisture and to help moderate the soil temperature. But do this only after your soil has warmed—mulching cool soil will keep it too cool and stunt the pepper plants’ growth.