Chestnut (Colossal)
Castanea sativa 'Colossal'
True to its name, Colossal produces enormous chestnuts that can reach the size of small plums, making it a showstopper in any home orchard. This European variety combines impressive size with excellent sweet flavor and meaty texture that's perfect for roasting. The nuts are much larger than typical American varieties while maintaining the rich, starchy sweetness that makes chestnuts a beloved fall treat.
Harvest
120-150d
Days to harvest
Sun
kas-TAN-nee-uh sa-TEE-vuh
Zones
5–7
USDA hardiness
Height
80-100 feet
Planting Timeline
Showing dates for Chestnut (Colossal) in USDA Zone 7
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Chestnut (Colossal) · Zones 5–7
Growing Details
Zone-by-Zone Planting Calendar
Complete Growing Guide
Light: kas-TAN-nee-uh sa-TEE-vuh. Soil: Clay, Loam (Silt), Sand. Soil pH: Acid (<6.0), Neutral (6.0-8.0). Drainage: Good Drainage. Height: 80 ft. 0 in. - 100 ft. 0 in.. Spread: 30 ft. 0 in. - 50 ft. 0 in.. Spacing: more than 60 feet. Growth rate: Medium. Propagation: Seed. Regions: Mountains, Piedmont.
Harvesting
Edible fruit in the form of nuts held in spiny protective husks called cupules. This prickly outer layer deters squirrels and other seed predators from getting to the nuts within them, before they are shed in October.
Type: Nut.
Harvest time: Fall
Bloom time: Summer
Edibility: Once a staple food in Europe but now enjoyed as a delicacy. Historically, chestnuts were ground into flour or coarse meal.
History & Origin
Origin: Western Asia and Southeastern Europe.
Advantages
- +Disease resistance: Deer, Drought, Poor Soil, Salt
- +Attracts: Bees, Small Mammals
- +Wildlife value: The nuts attract birds and other wild life.
- +Edible: Once a staple food in Europe but now enjoyed as a delicacy. Historically, chestnuts were ground into flour or coarse meal.
Companion Plants
Plant Together
Comfrey
Deep taproot brings up nutrients, leaves provide excellent mulch and compost material
White Clover
Fixes nitrogen in soil, provides ground cover, and attracts beneficial pollinators
Daffodils
Bulbs help deter rodents that might damage chestnut roots and fallen nuts
Elderberry
Attracts beneficial insects, provides wildlife habitat, and thrives in similar soil conditions
Hazelnut
Compatible nut tree that shares similar growing requirements and harvest timing
Yarrow
Attracts beneficial insects, improves soil health, and has deep roots that don't compete
Wild Ginger
Thrives in partial shade under canopy, provides ground cover, and doesn't compete for nutrients
Serviceberry
Compatible understory shrub that attracts pollinators and provides wildlife food
Keep Apart
Black Walnut
Produces juglone which is toxic to chestnuts and can stunt growth or kill young trees
Apple Trees
Can share common pests like aphids and diseases, creating increased pest pressure
Roses
Compete heavily for nutrients and water, may harbor pests that can spread to chestnuts
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #170575)
Pests & Disease Resistance
Resistance
Moderate resistance to chestnut blight
Common Pests
Chestnut weevil, gall wasps, Asian ambrosia beetle
Diseases
Chestnut blight, ink disease, root rot