Walnut trees typically grow about 1–2 feet per year under favorable conditions, although growth rates vary by species, climate, soil quality, and available moisture. It can take several decades for a walnut tree to reach its full mature height.

If you're growing walnut trees for nuts, grafted English walnut varieties may begin producing within approximately 4–7 years, while seed-grown walnut trees can take 10–15 years or longer. Consistent watering during establishment, adequate sunlight, and proper spacing support healthy growth and long-term productivity.