Noix de Grenoble, Nogal, Walnuss
Soil :Fertile, well-drained soil.
Position : Full sun or partial shade.
Frost tolerant : Yes, but flowers can be damaged by late frosts.
Helped by: European Alder (sacrifice plant), hairy vetch,crownvetch, sericea lespedeza
Avoid: apple trees, grasses
Sow and Plant :Prepare a large hole by breaking up the soil and adding plenty of well-rotted organic matter. A wide hole is better than a very deep one. Mulch after planting, and encircle the trunk with a wire cage or protective pipe to protect the young tree from animal and insect pests.
Spacing :Single Plants: 65′ 7″ (20.00m) each way; Rows: 65′ 7″ (20.00m) with 65′ 7″ (20.00m) row gap
Feeding : Mulch with well-rotted organic matter in spring.
Harvesting :Healthy walnut trees will bear for many decades. Knock down nuts when ripe, remove the peel and dry. If pickling, harvest while it is still possible to pierce the nuts with a skewer.
Time to harvest: days
Troubleshooting :Native black walnuts are often easier to grow in the US compared to English or Persian walnuts.
Notes :Black walnut is harmful to the growth of all nightshade plants, including Datura or Jimson weed, eggplant, mandrake, deadly nightshade or belladonna, capsicum (paprika, chile pepper), potato, tomato, and petunia.