A few general principles should always be kept in mind in selecting trees to plant. Every species has a characteristic habit of growth and it is desirable to select trees which have the greatest natural beauty of form consistent with hardiness and freedom from disease and insect pests in the location where they are to be planted. In the case of deciduous species the tree in winter may well be the basis, at least in part, of this choice, for then the eye is not distracted from consideration of form by the beauty of the leaves. The form chosen not only should be beautiful, but should harmonize with the position in which the tree is to be placed; as, for instance, narrow columnar crowns for narrow streets, broad spreading crowns for wide avenues, evergreens, in most cases, for screens, and deciduous trees near dwellings or schoolhouses. Native trees are often to be preferred, for the reason that they are known to flourish under the soil and climatic conditions of the region. Long-lived species, tough species that will not easily break or drop branches in high winds, and disease-resistant trees and those free from insect pests, are to be sought. Trees that sprout from the roots, such as poplar and black locust; have disagreeable odors, such as ailanthus; or are untidy or lose their leaves early, are in most cases to be avoided.
The species included in this list are generally hardy in the State indicated, though for any particular site it is best to obtain the advice of local or State authorities. The list is only suggestive and the absence of any species does not necessarily mean that it is unsuitable.
Native pines, live oak, willow oak, laurel oak, evergreen magnolia, holly, red (sweet) gum, and dogwood.
Arizona and smooth cypresses, American elm, Chinese elm, native cottonwood, silver-leaf poplar, honey locust, box elder, Arizona sycamore, green ash, black locust, hackberry, and tamarisk.
Chinese arborvitae, shortleaf pine, white oak, black oak, willow oak, sugar maple, red maple, evergreen magnolia, American elm, hickories, hack-berry, red (sweet) gum, and holly.
Foothills regions - Lawson cypress (Port Orford cedar), deodar cedar, California juniper, Monterey cypress, big tree, London (Oriental) plane, incense cedar.
1 Adapted from Arbor Day - Its Purpose and Observance. Farmers' Bull. 1492. U.S. Department of Agriculture, 1926.
Aleppo pine, Monterey pine, redwood, Monterey cypress, English elm, California sycamore, London (Oriental) plane, California walnut, Madrona, bigleaf maple, California live oak.
Incense cedar, big tree, Monterey cypress, coulter pine, Norfolk Island pine, deodar cedar, English elm, valley oak, blue gum, red gum, California sycamore.
Plains region - Western yellow pine, Rocky Mountain red cedar, American elm, Chinese elm, honey locust, hackberry, Russian olive, silver poplar.