Organic walnuts are deciduous trees, up to 3-5m tall, with grayish white bark, shallow longitudinal fissures, flaky branches, and fine soft hairs on the tips of young branches; 2-year-old branches are often hairless. Pinnate compound leaves are 25-50cm long, with 5-9 leaflets, rarely 13, elliptical-ovate to elliptical, terminal leaflets are usually larger, 5-15cm long, 3-6cm wide, with acute or acuminate tips, rounded or cuneate bases, sometimes heart-shaped, entire or with inconspicuous blunt teeth, dark green on the surface, hairless, with only fine hairs on the vein axils on the back, and very short or absent petioles. Male catkins are 5-10cm long, male flowers have 6-30 stamens, and calyxes are 3-lobed; female flowers are 1-3 clustered, with 2-lobed styles and scarlet red. Fruits are spherical, about 5cm in diameter, and gray-green. It has glandular hairs when young and no hairs when old. The nut inside is spherical, yellow-brown, and has irregular grooves on the surface. The flowering period is April to May, and the fruit ripens in August to September.
