Gardening in the American Southwest (SW) is an extreme sport. Not only are gardeners challenged by geographic extremes from tropical deserts to subalpine locales, they must also deal with a wide range of climates. Winter in the mountains and higher regions means heavy snows, frozen soils, and temperatures that can dip below zero. In contrast, summers in the desert can bring weeks where the temperature never gets below 100[degrees] during the day. Most SW public libraries will need a variety of regional gardening titles, including introductory guides to the subject, plant selection books, and resources on landscape design. Additional popular SW gardening topics include drought-resistant horticulture (if there is one consistent challenge throughout the SW, it is water conservation), environmentally responsible landscaping, such as xeriscaping (i.e., not requiring supplemental irrigation), and gardening with native plants. This article presents a list of titles and web resources that are essential for library's SW gardening collection.