walnut
When to prune walnut trees?
- Botanical name
- Juglans regia
- Family
- Juglandaceae
Walnut trees are pruned from July to September. They are planted from October to March. They are harvested from September to October.
Walnut trees are woody perennials. The edible parts are the seeds.
Walnut trees through the year
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this week
Pruning
Planting
Harvest
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- pruning
- planting
- harvest
In short
Pruning
from July to September
weeks 28 to 39
Planting
from October to March
week 40 to week 13 of the next year
Pruning cut
in summer
Spacing between plants
12 m
First crop
after 4 to 8 years
Harvest
from September to October
weeks 37 to 44
Growing conditions
🪨
Soil
loamy
🧪
pH
6 to 8
☀️
Sun
full sun
💧
Water
little water
❄️
Frost
overwinters outdoors
📏
Height
12 to 18 m
🐝
Pollination
needs a pollinating variety nearby
Pests and diseases
Listed here is every problem for which the sources name this plant as a host. The problems are not listed in order of how common they are.
Honey fungus
disease- Signs
- The plant dies suddenly, often in mid season and without any decline beforehand. Peel the bark at ground level and under it there is a white or cream sheet of fungal tissue, thin as the skin of a mushroom. In the soil there are black or brown strands like bootlaces. In late summer and autumn tufts of honey brown mushrooms with a whitish ring on the stalk appear by the stumps or over dead roots.
- Prevention
- The fungus spreads through the soil with its strands, from a few centimetres to a good hand's width below the surface, and infects the roots of a living plant when it touches them. So do not leave stumps and dead roots in the ground. No plant is completely resistant, but the source names privet, lilac, viburnum, weigela, forsythia, butterfly bush, rhododendron, thuja and walnut as particularly susceptible.
- What to do
- There are no products. The only thing that works is digging out and removing every infected root and stump, which takes away the food without which the strands in the soil do not grow. A vertical barrier of rubber or thick plastic sheet, buried about half a metre deep and standing a few centimetres above ground, stops the spread into an unaffected part of the garden.
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Sources about the plant: GBIF Backbone Taxonomy, NC State Extension Plant Toolbox, Oregon State University, Penn State Extension, Royal Horticultural Society, Utah State University Extension, Wikidata. Checked between 14 and 28 August 2026.