St. George, Utah, is in USDA Hardiness Zones 8a and 8b. When it comes to what to grow in St. George, Utah, you can grow vegetables like: • Potato • Pea • Onion • Lettuce • Carrots • Cabbage • Broccoli • Beets Some of the trees you can plant include: • Pomegranate • Pistachio • Pecan • Peach • Cherry • Apricot • Almond