Plan ahead for a balanced garden. While we are enjoying the start to fall foliage color, notably in the high zone, don't overlook the need for visual interest that includes strong evergreen appearances during winter. Instead of settling on a design with a strong seasonal theme that holds together visually for only a few weeks, aim for a mix of evergreen and deciduous foliage for a balanced garden. Massing local native cacti and shrubs, such as turpentine bush (Ericameria laricifolia) or creosote bush (Larrea tridentata), can accomplish this task nicely.In the lower zones, the same is true — using deciduous plants whose foliage drops is perfectly suitable when you pair them with evergreen species. Mexican evening primrose (Oenothera speciosa), ocotillo and desert willow (Chilopsis linearis) will add some seasonal interest — plus you'll get a bonus of blooms during the growing season.And no matter the Southwestern zone, it's most beneficial to consider species that thrive and mature with less water and in our often highly alkaline soils.Shown: threadgrass (Nasella tenuissima), prickly pear cactus (Opuntia), ocotillo (Fouquieria splendens) and Texas sage (Leucophyllum).More: More guides to Southwest gardening | Find your U.S. garden checklist