Walnut trees can generally be grown from seed without too much trouble. In particular, the black walnut tree can grow to heights of around 80 feet if planted in favorable conditions.
Because walnuts secrete a chemical toxin called juglone, it's advisable to plant seeds at least 50 feet away from other sensitive plants. The black walnut tree thrives in moist areas with good irrigation, especially on steep or hilly terrain.
Walnut trees should be planted at least 60 feet apart to allow for maximum foliage spread, although they can be placed around 30 feet from each other if you intend to grow them for their valuable wood. This will give the trunks room to grow straight and long.
When planting your seeds, remove the husks of the fruit and place five to six nuts several inches apart in a clustered formation.
Place a square of hardware cloth over the planted area and pin down to protect from squirrels and common garden pests. Cover the cloth with a mulch of leaves and straw to protect from freezing and mark the spot for future reference.
After a spell of cold damp weather, the seeds will germinate during spring. Remove the mulch and cloth and separate the area to prevent damage. After a few months, choose the best formed sapling from the cluster and remove the others. Maybe give them away as gifts!
Caring for your walnut tree through the years will be a source of peace, joy, and delicious, healthy snacks.