Quercus undulata 'Coconino' (Coconino Western Oak™)
The small, prickly, holly-like leaves of 'Coconino' are silver-gray; the tree is hardy and fully evergreen in Zone 5B and below. At maturity, the grafted tree should be about 20 feet tall. The silver-gray leaves and the black fissured bark of 'Coconino' make it a striking subject as either a specimen planting or in a group. It is very representative of the mixed oak/pine forests of the upper Southwest, a lovely reminder of hikes and camping trips on the Mogollon Rim in northern Arizona. Will do well across the West because of its region-adapted rootstock which is tolerant to high pH soils and arid conditions.
Quercus undulata 'Dolores River' (Dolores River Southwest Oak™)
With small, startlingly blue tinted foliage and modest stature, features not previously available commercially in an oak, Dolores River Southwest Heritage Oak™ is very desirable. The autumn change from blue to red-mahogany comes very late, November or December. It broadens the market for small trees by reducing the shortage of oak trees which can be grown without high maintenance costs in the arid West. Appropriate for small sites, arid locations and alkaline soils which cause many oaks to suffer chlorosis because of its region-adapted rootstock. This grafted form will grow with a single stem to 15-18 feet tall, with a 15-foot spread. It could easily be grown as a low branched spreading tree.
Quercus undulata 'Mesa de Maya' (Mesa de Maya Western Oak™)
Mesa de Maya Southwest Oak™ has large blue-gray leaves which hold their color late into autumn. The foliage lacks most prickles and the tree, reaching 25 feet in height at maturity, will be a stunning contrast to most background colors. In the arid and drought-prone West and the Southwest it will thrive because of it region-adapted, high pH tolerant rootstock. This grafted form will grow with a single stem to 25 feet tall with a 20-foot spread. It could also be branched low and grown as a multi-stemmed tree, as is common to its wild sisters.