Arizona Walnut

(Juglans major)

Arizona Walnut (Juglans major)

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Estimated Native Range
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Summary

Juglans major, commonly known as Arizona walnut, is a deciduous tree native to riparian woodlands, canyon bottoms, and moist forest clearings in the Southwestern USA and Mexico. It can grow up to 50 feet (15 meters) tall and is characterized by a single, stout trunk in moist areas, while in drier conditions, it often develops several slender trunks. The Arizona walnut’s foliage is compound with lance-shaped leaflets, and it produces inconspicuous greenish flowers in late spring, followed by a small nut with a thick, deeply grooved shell that encases an oily, edible seed.

The Arizona walnut is valued for its ability to thrive in a variety of soil conditions, from well-drained to moist, and it requires medium amounts of water. It is best grown in full sun but can tolerate partial shade. This tree is often used in naturalized plantings, as a shade tree in large landscapes, and for its edible nuts. However, it is not commonly found in urban settings due to its large size and the potential mess from fallen nuts and leaves. Gardeners should be aware that the roots can be aggressive and may interfere with nearby structures or plumbing. There are no significant disease or pest issues, but walnut trees produce a chemical called juglone, which can be toxic to certain plants grown nearby.CC BY-SA 4.0

Plant Description

  • Plant Type: Tree
  • Height: 30-50 feet
  • Width: 30-50 feet
  • Growth Rate: Slow
  • Flower Color: N/A
  • Flowering Season: Spring
  • Leaf Retention: Deciduous

Growth Requirements

  • Sun: Full Sun
  • Water: Medium
  • Drainage: Fast, Medium

Common Uses

Bee Garden, Bird Garden, Butterfly Garden, Deer Resistant, Edible*Disclaimer: Easyscape's listed plant edibility is for informational use. Always verify the safety and proper identification of any plant before consumption., Fragrant, Low Maintenance

Natural Habitat

Native to riparian woodlands, canyon bottoms, and moist forest clearings in the Southwestern USA and Mexico

Other Names

Common Names: Arizona Black Walnut , New Mexico Walnut , Nogal , Nogal Silvestre

Scientific Names: Juglans major , Juglans major var. major , Juglans elaeopyren , Juglans rupestris var. major , Juglans major subsp. glabrata , Juglans microcarpa subsp. major , Juglans microcarpa var. major , Juglans elaepyren

GBIF Accepted Name: Juglans major (Torr.) A.Heller