Type
European-Japanese hybrid, needs pollinizer
Chestnut variety
Colossal Chestnut
A widely planted commercial hybrid with very large nuts and a spreading tree habit. It needs compatible chestnut pollen and is better suited to climates where chestnut blight pressure is managed.
Season
early to mid fall
Best for
large nuts and mild-climate orchards
About Colossal
Colossal is a Japanese-European hybrid chestnut grown for very large, attractive nuts and good productivity. It has useful chestnut-blight resistance but is not immune to the disease.
Growing Colossal Chestnut
Plant Colossal with compatible chestnut pollinizers, as it is not self-fertile and is a poor pollen source. Harvest when burs split naturally in fall, and avoid poorly drained sites because chestnuts are sensitive to root disease.
Full growing guide
For planting, care, pollination, and harvest that apply to all chestnut, see the complete guide.
How to grow ChestnutOther chestnut varieties
Variety characteristics are general guidance for US home gardens; chill hours, hardiness, and pollination vary, so confirm suitability for your zone. Availability differs by supplier. Page updated Aug 4, 2026.