Nuts· Juglans regia
Walnut Growing Guide
Large deciduous tree producing premium nuts rich in omega-3 fatty acids. English (Persian) walnut is the primary commercial species, often grafted onto black walnut rootstock.
How Long Does Walnut Take to Grow?
Walnut typically reaches its first harvest about 6 years after planting.
FAO. 2025. FAOSTAT: Production: Crops and livestock products. Accessed on 13 October 2026. https://www.fao.org/faostat/en/#data/QCL Licence: CC-BY-4.0.
Growing Conditions
Soil Requirements
Soil Type & pH
Best soil types: deep loam, silt loam, alluvial
pH range: 5.5 - 6.5 (optimal: 6)
Drainage: good
Nutrient Needs (N-P-K)
Planting Guide
Yield & Economics
Common Pests & Diseases
Common Pests
- codling moth
- walnut husk fly
- aphids
Common Diseases
- walnut blight
- crown rot
- thousand cankers disease
Use AI crop disease detection to identify issues early and prevent crop losses.
Growing Tips
Walnuts produce juglone, a compound toxic to many plants — avoid planting tomatoes, peppers, or apples within the drip line of walnut trees.
Harvest when the green hull begins to split and separate from the shell; delay causes kernel darkening and quality loss.
Requires 400-1500 chill hours depending on variety; select cultivars matched to your specific winter climate.
Frequently Asked Questions
How long does Walnut take to grow?
Walnut typically takes about 6 years from planting to first harvest. Seeds germinate in about 60 days. The best planting season is winter, spring.
What soil does Walnut need?
Walnut grows best in deep loam, silt loam, alluvial soil with a pH of 5.5-6.5. Good drainage is required.
What temperature does Walnut need?
Walnut grows best at 15-28°C. Frost tolerance: moderate. Heat tolerance: moderate.
What is the expected yield for Walnut?
Across 56 countries with grounded data, reported national yields for Walnut range from 40 to 19,000 kg in-shell/hectare, with a median of 2,360. These are national statistics, not a best-case figure — an individual farm's yield depends on variety, climate, soil and management.
Key Agronomy Terms
Core farming concepts, explained in plain language.
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