This garden, in this picture just under construction, features a fence design that is an expanded metal envelope filled with river rock. It will keep out javalinas and rabbits but serve as a high-rise hotel to lizards. The rustic wall also matches the hand-made character of the straw-bale home which the owners built themselves. The south-facing fence has warmed and nurtured a pair of Mexican fencepost cactus that are among the most handsome specimens on Tucson’s east side. The garden is also home to two fetching yellow chuperosa, a refreshing break from the more common red variety.