Juglans californica shell that is difficult to remove. The Chumash Indians of the Channel Islands of California and Ventura County eat the nuts; however, they are not grown commercially for this purpose. "Juglans californica" is cultivated throughout California to support the walnut industry, used as a rootstock in English walnut orchards. It is also cultivated as an ornamental tree where it is planted in California native plant, xeriscape, and wildlife habitat gardens and natural landscaping in California, and in Hawaii. Some authorities (e.g. the California Native Plant Society) combine this species with "J. hindsii". On the other hand, a 2007 molecular analysis
Fruit tree propagation "Colt" rootstock. A newer rootstock, "Gisela 5", is slowly becoming available to gardeners and produces a tree 20% smaller than "Colt" and 45% smaller than "Mahaleb" and "Mazzard", making netting for bird protection much easier. Furthermore, German Nurseries Consortium (Consortium Deutscher Baumschulen — CDB®) is introducing across the EU their newest most dwarfing "Gisela 3" cherry rootstock that has 50% dwarfing qualities in comparison with "Mahaleb" and "Mazzard" and is 10% smaller still than "Gisela 5" rootstock. Plum rootstocks are often suitable for peaches, nectarines and apricots. They include: Many species of fruit, e.g., fig, olive, and pomegranate, are commonly