nut variety
Theta
Hazelnut · Corylus species and hybrids
USDA hardiness range
- Zones
- 5a–7b
- Chill hours
- 800 to 1500 below 45°F
- Days to harvest
- 100 to 130
- Sun
- Full
- Water
- Moderate
- Lifespan
- 40 to 70 years
Disease resistance
- eastern-filbert-blight
At a glance
Sweet, rich, large nuts with easy crack-out; baking and fresh. OSU pollinizer for Jefferson, EFB-resistant, productive in its own right.
Growing Theta
Detailed guidance for this section is being prepared. Check back soon.
Flavor, texture, and use
Detailed guidance for this section is being prepared. Check back soon.
Growing notes
Detailed guidance for this section is being prepared. Check back soon.
Theta by zone
Zone-specific suitability, frost timing, and adjacent-zone notes.
Other hazelnut varieties
4 sibling cultivars profiled on ZonePlant.
- 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
- What zones does the Theta hazelnut grow in?
Theta grows in USDA zones 5a through 7b.
- What diseases is Theta resistant to?
Theta shows documented resistance to eastern-filbert-blight.
- How does Theta compare to other hazelnut varieties?
Theta is one of 5 hazelnut varieties profiled on ZonePlant. See the full hazelnut variety table for side-by-side comparison.
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Image: "Hazelnuts", by Fir0002 at English Wikipedia, via Wikimedia Commons, licensed under CC-BY Source.
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