the dry southwest ranges across arid valleys & up into adjacent foothill areas beneath round a unadorned 6 000-foot elevation. many es have a thin quilt of barren region bunch gr es reminiscent of black grama or muhley and scattered shrubs together with creosote or brittle with barren region willows and mesquites lining dry washes often known as arroyos. foothill es recreation plentiful often large ly p cacti scattered evergreen alright & different bold accessory crops. decrease elevations have even more parts akin to feathery green palo verde trees & substantial cacti.
each and every main zone indexed underneath varies due adjustments in elevation & distance from the equator. plus there are smaller microclimates inside es including arroyo and wash bottoms north- or south-going through walls and s & heavily built up es without trees mitigate the daily of onerous surfaces. the southwest is split into the following three zones of total and excessive temperatures. southwest gardening.
if you in just one of the arid or semiarid areas of the u. s. southwest this gardening zone guide is for you.