Nearly three-quarters of Texans live on the “dry side” of Texas—the South and Central Texas expanse west of I-35, which includes the Rio Grande Valley north through San Antonio, Austin, and the Dallas–Fort Worth area—that receives fewer than 40 inches of rain annually. In Gardening on the Dry Side of Texas, Southwestern horticulturist Mary Irish presents a guide to the selection and care of plants that will be successful in these and other increasingly hot and dry conditions....