Walnut — Trees

Juglans regia

Full sun, moderate watering — fully hardy.

Photograph of Walnut — iNaturalist / GBIF

Plant out: Nov
Harvest: Oct
In flower: May, Jun

Sun: Full sun
Water: Medium
Difficulty: Easy
Hardiness: H6
Season: summer
Pets: Toxic to pets

Grows well with

Tomato — Keep tomatoes away from a walnut tree. The walnut releases chemicals into the soil that hold other plants back, and tomatoes are said to suffer particularly.

Growing notes

Grows to higher than 12 metres. Space about 800+cm apart. In flower May-Jun.

Toxic to pets

Mouldy walnuts and the green husks can poison a dog, causing sickness, trembling and wobbliness.

→ Your vet, Animal PoisonLine, or the Veterinary Poisons Information Service.