nut variety in zone 6a
Theta hazelnut in zone 6a
Theta · Corylus species and hybrids
- Zone
- 6a -10°F to -5°F
- Growing season
- 180 days
- Chill needed
- 800 to 1500 below 45°F
- Days to harvest
- 100 to 130
The verdict
Detailed guidance for this section is being prepared. Check back soon.
About Theta
Sweet, rich, large nuts with easy crack-out; baking and fresh. OSU pollinizer for Jefferson, EFB-resistant, productive in its own right.
Critical timing for zone 6a
Detailed guidance for this section is being prepared. Check back soon.
Common challenges in zone 6a
- ▸ Brown rot in stone fruit
- ▸ Japanese beetles
- ▸ Spring frost damage to peach buds
Disease resistance
Documented resistance for Theta; useful for low-spray management in zone 6a.
- eastern-filbert-blight
Modified care for zone 6a
Detailed guidance for this section is being prepared. Check back soon.
Theta in adjacent zones
Other hazelnut varieties for zone 6a
- American Hazelnut
Sweet, mild, small nuts; fresh, baking. Native Corylus americana, naturally EFB-tolerant. Multi-stem shrub for…
- Beaked Hazelnut
Sweet, intensely flavored, very small nuts; foraging quality, hedgerow use. Native Corylus cornuta, extremely …
- Jefferson
Sweet, rich, buttery; fresh, baking, confections, butter. Large round nuts. The Oregon State release that resi…
- Yamhill
Sweet, rich flavor, smaller round nuts; fresh and processing. Compact OSU release with strong EFB resistance, …
Frequently asked questions
- Will Theta hazelnut grow in zone 6a?
Yes. Theta is recommended for USDA zones 5a through 7b, which includes zone 6a.
- Are there enough chill hours in zone 6a?
Hazelnut needs 800 to 1500 chill hours. Zone 6a typically meets this range; check local microclimate against historical chill totals to confirm.
- Does Theta resist regional diseases in zone 6a?
Theta carries documented resistance to eastern-filbert-blight, which can simplify low-spray management in zone 6a.
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Image: "Hazelnuts", by Fir0002 at English Wikipedia, via Wikimedia Commons, licensed under CC-BY Source.
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