Walnut trees are generally 3-5 meters high, with gray bark, shallow longitudinal cracks, flaky branches and fine hairs at the tips of young branches (2-year-old branches are often hairless). There are also 20-25 meters high, with shorter trunks and wider crowns than other species. Bark is grayish green when young, grayish white when old, and shallow longitudinally. Branchlets glabrous, shiny, peltate glands, grayish green, and later brownish.

Growth habit of walnut

Walnut likes light, cold resistance, drought resistance and disease resistance, adapts to the growth of various soils, and likes fertile and humid sandy loam, water, fertilizer and sunshine. At the same time, the requirements for water and fertilizer are not strict, and it is not suitable for pruning after defoliation and before germination, which is easy to cause bleeding. Suitable for most land growth. Calcareous soil is common in deep soil on both sides of the valley.

Produced in North China, Northwest China, Southwest China, Central China, South China and East China, and South and West Xinjiang. Distributed in Central Asia, West Asia, South Asia and Europe. Born in hillside and hilly areas at an altitude of 400- 1800 meters, it is widely cultivated in China plain and hilly areas.