When to Plant Walnut in Sydney, Warm Temperate Guide

Plant July to August. Right now in September it is out of season. The next planting month is July.

Published · Last reviewed · By Garden Buddy
Growing advice is reviewed by hand. Planting dates, current conditions and prices on this page update daily.

This Walnut guide is written for the Warm Temperate zone, which takes in Sydney, Newcastle and Wollongong. Somewhere else? Your postcode picks the right one.

Not your zone? Cairns Brisbane Melbourne Canberra Alice Springs Perth

Also handy: will it frost this week? and what grows in shade.

Walnut

Photo: Wikimedia Commons

Large deciduous nut tree that needs cold winters (500-1000+ chill hours) and warm dry summers. One of the best nut trees for cool-temperate and cold-highland Australia. Beautiful timber tree and shade tree. Important: walnut trees produce juglone, a chemical toxic to many plants grown nearby (allelopathy). Long-lived (100+ years). English walnut (J. regia) is the eating nut; Black walnut (J. nigra) used as rootstock and for timber.

Best Planting Window for Warm Temperate

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
- - - - - - P P - - - -

P = Planting window

Plant bare root July-August. Only in areas with adequate chill (hills, western areas).

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How to Grow Walnut in Warm Temperate Australia

When to Plant

Plant bare root July-August. Only in areas with adequate chill (hills, western areas).

Soil
Deep, fertile, well-drained. Walnuts have deep tap roots and need minimum 2m soil depth. Reasonably tolerant of clay but must not be waterlogged.
pH Range
6.0-7.5
Sunlight
Full sun.

Companion plants: Grass (tolerant of juglone)

Avoid planting near: Tomato, potato, pepper, eggplant (juglone sensitive), Apple trees (some juglone sensitivity), Azalea, rhododendron (juglone sensitive), Any plant within root zone that is juglone-sensitive

Warm Temperate Growing Tips for Walnut

Recommended Varieties

  • Chandler (lateral-bearing, most popular commercial variety)
  • Howard (lateral-bearing)
  • Vina

Key Challenges

  • Marginal chill in coastal areas
  • Blight in wet springs

Pro Tips

  • Blue Mountains and western Sydney hills may succeed.
  • Coastal Sydney is marginal for chill.
  • Lateral-bearing varieties are more productive and bloom later.

Harvesting Walnut

When ready: Green husk cracks and separates from shell. Nuts begin to fall from tree. Shake branches to accelerate harvest.

How to harvest: Collect fallen nuts. Remove any remaining husk (stains hands, wear gloves). Dry in single layer in shade for 2-3 weeks until shell interior walls are dry.

Where to next

Also worth sowing in the warm temperate zone this September: Ginger, Beetroot, Chilli Peppers and Cucumber.

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Common Questions About Walnut

When do you plant walnut in Australia?

It depends on your climate zone, not the calendar month alone. Planting months by zone:

Which zone am I in?

Type your postcode into the box under the heading and the page tells you, and links this crop in your own zone if it differs. Or look it up on the grow zone map. This page is the Warm Temperate zone, Sydney is its reference city.