Growing tomatoes in Arizona’s low desert, including San Tan Valley, Queen Creek, and Florence, is a rewarding challenge that requires strategic planning to navigate the region’s intense heat and low rainfall (8-12 inches annually). In Pinal County’s arid climate (USDA Hardiness Zones 9a-10b), selecting heat-tolerant varieties, timing planting correctly, and using water-efficient practices are key to a bountiful harvest. This guide, informed by the University of Arizona Cooperative Extension and Pinal County Master Gardeners, provides essential tips for success, compares Arizona’s planting times with other U.S.