nut variety in zone 5a
Thomas black walnut in zone 5a
Thomas · Juglans nigra
- Zone
- 5a -20°F to -15°F
- Growing season
- 150 days
- Chill needed
- 700 to 1500 below 45°F
- Days to harvest
- 150 to 200
The verdict
Detailed guidance for this section is being prepared. Check back soon.
About Thomas
Bold, intense, distinctively earthy black-walnut flavor; baking (cookies, cakes, ice cream), fudge. The heritage productive variety, large nuts with thicker shells than English walnut. Self-fertile but better with a partner.
Critical timing for zone 5a
Detailed guidance for this section is being prepared. Check back soon.
Common challenges in zone 5a
- ▸ Fire blight in pears
- ▸ Cedar-apple rust
- ▸ Late spring frosts
Modified care for zone 5a
Detailed guidance for this section is being prepared. Check back soon.
Thomas in adjacent zones
Other black walnut varieties for zone 5a
- Emma K
Bold, intensely flavored, very large kernels; baking and shelling. High kernel-to-shell ratio for a black waln…
- Sparks 127
Bold, classic black-walnut flavor, medium kernels; baking. Compact tree (40-50 ft mature) suitable for smaller…
- Sparrow
Bold, rich black-walnut flavor; baking and confections. Early-ripening selection that finishes before first fr…
Frequently asked questions
- Will Thomas black walnut grow in zone 5a?
Yes. Thomas is recommended for USDA zones 5a through 8a, which includes zone 5a.
- Are there enough chill hours in zone 5a?
Black Walnut needs 700 to 1500 chill hours. Zone 5a typically meets this range; check local microclimate against historical chill totals to confirm.
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Image: "Juglans nigra nuts", by Gmihail at Serbian Wikipedia, via Wikimedia Commons, licensed under CC-BY Source.
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