Arizona Walnut (Major)

The Arizona Walnut (Major) is generally described as a perennial tree. This is native to the U.S. (United States) has its most active growth period in the spring and summer . The greatest bloom is usually observed in the late spring, with fruit and seed production starting in the fall and continuing until winter. Leaves are not retained year to year. The Arizona Walnut (Major) has a long life span relative to most other plant species and a slow growth rate. At maturity, the typical Arizona Walnut (Major) will reach up to 50 feet high, with a maximum height at 20 years of 20 feet.

The Arizona Walnut (Major) is usually not commercially available except under contract. It can be propagated by bare root, container, cuttings, seed. It has a slow ability to spread through seed production and the seedlings have medium vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -33°F. has medium tolerance to drought and restricted water conditions.

Plant Basics
Category
Growth Rate Slow
General Type Tree
Growth Period Spring, Summer
Growth Duration Perennial
Lifespan Long
Plant Nativity Native to U.S.
Commercial Availability Contracting Only
Physical Characteristics
Bloom Period Late Spring
Displays Fall Colors Yes
Shape/Growth Form Single Stem
Drought Tolerance Medium
Shade Tolerance Intolerant
Height When Mature 50
Vegetative Spread None
Flower Color Brown
Flower Conspicuousness No
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Fall Winter
Seed Spread Rate Slow
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Container, Cuttings, Seed
Moisture Requirements Medium
Cold Stratification Required Yes
Minimum Temperature -33
Soil Depth for Roots 40
Toxic to Nearby Plants Yes
Toxic to Livestock No
After-Harvest Resprout Ability Yes
Responds to Coppicing Yes
Growth Requirements
pH Range 6–7 pH
Precipitation Range 25–25 inches/yr
Planting Density 100–800 indiv./acre
Soil Textures Coarse, Medium
Soil Depth for Roots 40
Minimum Frost-Free Days 105 day(s)
Salinity Tolerance None
CaCO3 Tolerance Low
Sustainability & Use
Leaf Retention No
Palatability Low
Fire Resistant No
Causes Livestock Bloating None

Source: USDA, NRCS, PLANTS Database, plants.usda.gov.
National Plant Data Center, Baton Rouge, LA 70874-4490 USA