Arizona salt tolerant plants for the desert

Chinese Pistache (Pistacia chinensis). This is an ornamental deciduous tree with bright green leaves that turn red in the fall. The female plant produces clusters of pepper seeds. It grows up to 40' high and 30' wide. The most interesting aspect of this tree it that it turns a brilliant redish/orange in fall. Ths is the only desert tree whose leaves turn this shade of red. This tree is hardy to below 20 degrees and is heat and drought tolerant, requires little maintenance, and is resistant to oak root fungus. Plant this tree in well draining soil, water deeply and infrequently.

Cascalote Tree - Arizona Xericsape Tree

Cascalote
Caesalpinia cacalaco, Synonym: Russellodendron cacalaco, Coulteria mexicana, Poinciana horrida
Family: Fabaceae. Great Xeriscape plant.

This tree produces large spikes of light yellow flowers in most of winter and attractive copper-colored pods. It is native to Mexico and does very well in the Arizona desert. The Cascalote will make a nice patio tree. It is slow growing and only reaches at most 20 feet tall. It can be pruned to shape and thin. It will suffer some frost bite if temperatures go below 20 degrees. This tree does best in full sun with well drained soil. Looks very much like the Mexican Bird of Paradise but larger.

USDA: 9-10
Frost Tolerance: Hardy to 20°F (-7°C)
Sun Exposure: Full sun
Origin: Southern Mexico
Growth Habits: Evergreen tree, growing slowly to 20 feet tall, 20 feet wide (6 x 6 m)
Watering Needs: Little to moderate water
Propagation: Seeds
Thorns: Has thorns but there are thornless types

Chaste Tree - Vitex agnus - castus

Vitex agnus - castus, Verbena Family ( Verbenaceae ), Chaste Tree. Also Called: Monk's Pepper is a large irregular shrub or multistemmed deciduous tree, sometimes single stemmed. Considered pool friendly. Also considered butterfly friendly. Smells Great! Most flower types are purple but there are other colors that are a light purple - pink.
Height: About 10 to 25 feet. Same spread. Flowers: On purple spikes 7 to about 12 inches long, drooping from terminal portions of branches, appearing in the late spring and early summer. Blooming Time: April to June. Stems/Trunks : An attractive rough trunk; multistemmed deciduous tree, sometimes single stemmed. Leaves: The leaves are palmately compound; with an odd number of linear leaflets (usually 5); dark green above, lighter underneath. Seeds: Small hard round seed, smells like pepper, dark purple when ripe. Can hurt if stepped on barefoot. Elevation: 0 - 2,400 Feet. Habitat: Landscaping. Grows great in the Arizona desert. Will be a nice patio shade tree or small ornamental yard tree. This tree does go dormant in the winter.

Featured Tree: Desert Willow

The Desert Willow tree grows to be 15' - 25' feet in height and has a spread of about 10' at full maturity. This tree grows at a medium growth rate. (13-24" of growth per year) and does well in full sun. The Desert Willow grows in acidic, alkaline, drought tolerant, loamy, sandy, well drained, wide range, clay soils(perfect for Arizona desert trees) and cannot grow in wet or heavy soils. The Desert Willow has a rounded, spreading or horizontal shape. The leaves are long dark green leaves. The blooms are fragrant and pink and it flowers from late spring into fall through the summer. It produces a ten-inch long seed-pod that persist throughout the winter. The Desert-willow requires little maintenance and produces flowers at peak season. It should be grown in full sun and is extremely drought-tolerant. While the trees will grow better with adequate moisture, they will not tolerate over-watering. The multi-trunked, well branched habit of growth and thick growth make Desert-Willow well suited for a wide screen or tall hedge. Groups can be planted in a large-scale landscape for a splash of color. The seeds of the Desert Willow are eaten by wildlife and the flowers often attract hummingbirds. It can provide a nesting site for desert birds and ground cover for other animals. The branches of the Desert-willow have been used to make thatch roofs. This tree resembles a willow in appearance, but is not related.