Sources

GBIF — Scientific name
GBIF - Juglans regia (species) taxonomy record — Plant family
RHS — Plant family, Height (cm), Sun needs, Soil notes
RHS Pests A–Z; UC IPM Pest Notes — Pest vulnerabilities
USDA PLANTS Database, Cornell Cooperative Extension — Root depth
NC State Extension / USDA Forest Service — Years to maturity
PFAF — Lifespan, Edible
PFAF (Plants for a Future), USDA PLANTS Database — Is allelopathic
PFAF (Plants For A Future) — Min. hardiness temp (°C)
Sprent 2009, Legume Nodulation (Wiley-Blackwell); actinorhizal genera per Pawlowski & Demchenko 2012 — Nitrogen fixer
Penn State Extension — gardening around walnuts (juglone) — Allelopathy effect
Wikipedia — Scientific name, Plant family, Years to maturity, Lifespan, Height (cm), Edible, Sun needs, Water needs, Soil notes, Needs pollination, Spacing cm

Walnut

tree

Juglans regia

Large long-lived tree — allow adequate space. Allelopathic; inhibits growth of many plants beneath it. First crops typically 5–8 years after planting.

Deciduous tree
Nut crop
Long-lived
Deep-rooted

Pests & beneficial insects

🐛 Prone to: Aphids, Caterpillars.

Attract Hoverflies, Lacewings, Ladybugs, Parasitic wasps to keep them in check.

How to grow Walnut

Space600 cm apart
GrowFull sun

Water: Medium · Height: 1500 cm · Soil: Deep, well-draining, slightly alkaline — dislikes waterlogging

Want exact dates? Create a free account to see sowing windows tuned to your local frost dates.

Sources

GBIF — Scientific name
GBIF - Juglans regia (species) taxonomy record — Plant family
RHS — Plant family, Height (cm), Sun needs, Soil notes
RHS Pests A–Z; UC IPM Pest Notes — Pest vulnerabilities
USDA PLANTS Database, Cornell Cooperative Extension — Root depth
NC State Extension / USDA Forest Service — Years to maturity
PFAF — Lifespan, Edible
PFAF (Plants for a Future), USDA PLANTS Database — Is allelopathic
PFAF (Plants For A Future) — Min. hardiness temp (°C)
Sprent 2009, Legume Nodulation (Wiley-Blackwell); actinorhizal genera per Pawlowski & Demchenko 2012 — Nitrogen fixer
Penn State Extension — gardening around walnuts (juglone) — Allelopathy effect
Wikipedia — Scientific name, Plant family, Years to maturity, Lifespan, Height (cm), Edible, Sun needs, Water needs, Soil notes, Needs pollination, Spacing cm

Grow or find Walnut

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