Quercus oblongifolia | Coastal Southern California
A set of forty-eight inch box Mexican Blue Oaks (Q. oblongifolia) growing in a nursery in coastal southern California. Mexican Blue Oaks display a moderately strong upright growth habit, making them easy to train into typical landscape configurations. Here the lower branches of the trees have been aggressively retained, serving to feed carbohydrates into the lower trunk, leading to favorable and desirable trunk taper. There is also some anecdotal evidence that retaining foliated lower branches serves to enhance root, both by providing shade to the top of the rootball, and also by increasing energy storage near the base of the tree.