nut variety in zone 7b
Colossal chestnut in zone 7b
Colossal · Castanea species and hybrids
- Zone
- 7b 5°F to 10°F
- Growing season
- 220 days
- Chill needed
- 400 to 700 below 45°F
- Days to harvest
- 120 to 180
The verdict
Detailed guidance for this section is being prepared. Check back soon.
About Colossal
Sweet, mild, very large nuts with easy peeling; roasting, fresh, processing. European x Japanese hybrid, the West Coast commercial standard. Requires a pollinizer.
Critical timing for zone 7b
Detailed guidance for this section is being prepared. Check back soon.
Common challenges in zone 7b
- ▸ Cedar-apple rust pressure heavy in piedmont
- ▸ Japanese beetles
- ▸ Brown marmorated stink bug
- ▸ Late summer disease pressure
Modified care for zone 7b
Detailed guidance for this section is being prepared. Check back soon.
Colossal in adjacent zones
Other chestnut varieties for zone 7b
- Chinese Chestnut
Sweet, starchy, classic chestnut flavor; roasting, baking. Pure Castanea mollissima seedling, naturally blight…
- Dunstan
Sweet, starchy, classic roasted-chestnut flavor; roasting, soup, stuffing, flour. American x Chinese hybrid wi…
- Sleeping Giant
Sweet, classic flavor, medium nuts; roasting and culinary. American x Japanese hybrid with good blight resista…
Frequently asked questions
- Will Colossal chestnut grow in zone 7b?
Yes. Colossal is recommended for USDA zones 5b through 8a, which includes zone 7b.
- Are there enough chill hours in zone 7b?
Chestnut needs 400 to 700 chill hours. Zone 7b typically meets this range; check local microclimate against historical chill totals to confirm.
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Image: "Gebarsten bolster van een paardenkastanje (Aesculus) 20-09-2020 (d.j.b.) 01", by Dominicus Johannes Bergsma, via Wikimedia Commons, licensed under CC-BY Source.
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