Common Walnut

Common Walnut Juglans Regia

What is the plant

Walnut trees produce not only a delicious, nutritious nut but are used for their wood for fine furniture. These beautiful trees also provide shade in the landscape with their large, arching limbs.Walnuts (Juglans spp.) are attractive, nut-bearing landscape trees that offer shade in the summer and ornamental interest in the winter. Commonly planted varieties include the English walnut (Juglans regia) and the Northern California black walnut (Juglans hindsii). Also called the Persian walnut, the English variety typically winters well in U.S. Department of Agriculture plant hardiness zones 4 through 9, while the Northern California black walnut prefers the warmer winters offered in USDA zones 7 through 9. Giving your walnut proper care helps your tree grow healthy and strong.

It can have an aggressive root system.

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Lighting

Full Sun

Hardiness zone

5a - 9b

Difficulty

Medium

Water
Water young walnut once a week from spring through late summer. Use a garden hose or a soaker hose to give your tree between 3 and 5 gallons of water each irrigation session for the tree's first year of growth.
Sunlight
Full Sun
Fertilizer
Fertilize established walnut trees in the early spring. The University of California suggests giving your tree a nitrogen boost by applying 8 to 10 pounds of fertilizer that contains ammonium sulfate. Sprinkle the fertilizer beneath the canopy, keeping the material at least 1 1/2 feet away from the tree's trunk. Immediately give the freshly treated soil a deep drink of water.

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Soil
Plant your walnut tree in fertile, well-draining soil that receives full sun to partial shade.
Pruning
Prune your walnut tree in the winter dormant season before the leaves drop. Cut out any dead, damaged or diseased limbs and thin out crowded areas to let more sunlight and air reach the center of the tree.
Temperature
Avoid exposed sites or frost pockets where strong winds and late frosts may damage flowers.