Growing walnut (english / persian)

nut

Pollination

Self-fertile, but male and female flowers on one tree often open at different times - a second variety greatly steadies the crop.

Growing it

Zones 5-9. A very large, long-lived tree. Its roots and leaves release juglone, which stunts or kills tomatoes, apples, blueberries and many other plants nearby.

Will you get enough chill?

Walnut (English / Persian) needs roughly 400–1500 hours between 32 and 45 °F over winter to break dormancy evenly. Check your area with the chill hours calculator. Low-chill breeding has pushed many varieties well below the figure here, so read the plant tag.

Chill and pollination are given at the fruit-type level; specific cultivars can differ. Values are typical ranges for home-garden planning.