How to Grow American Hazelnut Trees from Seed (Germination Guide)
The American Hazelnut (Corylus americana) is a hardy native North American shrub valued for its edible nuts, attractive fall color, and importance to wildlife.
Growing American Hazelnut from seed takes patience because the seeds require a long cold, moist stratification period before they germinate reliably.
Quick American Hazelnut Germination Guide
Soak: Soak seeds in water for 24 hours
Stratification: Cold stratify for 120–180 days in a damp medium
Planting depth: Sow 1–2 inches deep
Moisture: Keep evenly moist
Germination: Approximately 2–8 weeks after stratification
Step 1: Soak American Hazelnut Seeds for 24 Hours
Soak American Hazelnut seeds in room-temperature water for 24 hours before beginning cold stratification.
After soaking, move the seeds directly into a damp stratification medium.
Step 2: Cold Stratify American Hazelnut Seeds for 120–180 Days
Place the soaked seeds in a damp medium such as vermiculite, peat moss, or another moisture-retaining seed-starting medium.
Place the seeds and medium inside a sealed plastic bag or lidded container and refrigerate for 120–180 days.
Duration: 120–180 days
Medium: Damp, but not saturated
Location: Household refrigerator
Moisture: Keep the medium consistently damp
Check the medium periodically during stratification and add a small amount of moisture if needed. Avoid allowing the medium to become waterlogged.
Step 3: Sow American Hazelnut Seeds 1–2 Inches Deep
After completing the cold stratification period, the seeds are ready to plant.
- Fill a container or prepared planting area with well-draining soil.
- Sow each seed 1–2 inches deep.
- Water gently after planting.
- Keep the soil evenly moist during germination.
- Avoid allowing the soil to remain saturated.
American Hazelnut seeds typically germinate in approximately 2–8 weeks after stratification under suitable growing conditions.
How Long Do American Hazelnut Seeds Take to Germinate?
After cold stratification, American Hazelnut seeds typically germinate in approximately 2–8 weeks under suitable growing conditions.
Germination can be uneven, so keep the soil evenly moist and continue caring for the planting area even if some seeds emerge before others.
American Hazelnut Seedling Care
Once seedlings emerge:
- Provide bright light
- Keep the soil evenly moist but not waterlogged
- Gradually acclimate indoor-grown seedlings to outdoor conditions
- Protect young plants from drying winds
- Handle roots carefully when transplanting
Hardening Off American Hazelnut Seedlings
Seedlings started indoors should be gradually acclimated to outdoor conditions before permanent planting.
- Wait until seedlings have several true leaves and outdoor temperatures are mild.
- Begin with a short period outdoors in bright shade.
- Gradually increase outdoor time and sunlight exposure over 7–14 days.
- Protect young plants from strong wind and monitor soil moisture closely.
- Transplant once seedlings are acclimated to outdoor conditions.
Where Should American Hazelnut Be Planted?
American Hazelnut is a hardy native shrub that works well in edible landscapes, wildlife plantings, hedgerows, food forests, and naturalized areas.
Choose a site with:
- USDA Zones: 4–9
- Light: Full sun to partial shade
- Soil: Moist, fertile, well-drained soil
- Space: Enough room for a broad, multi-stemmed shrub
More sunlight generally supports stronger growth and better nut production.
Do You Need More Than One American Hazelnut for Nut Production?
Planting multiple genetically distinct American Hazelnuts nearby is recommended when nut production is the goal.
Growing more than one plant can improve cross-pollination and help support a more reliable nut crop.
Will American Hazelnut Seeds Grow True to the Parent Plant?
No. American Hazelnut plants grown from seed are genetically unique.
Seed-grown plants may vary in:
- Nut size
- Nut quality
- Growth habit
- Productivity
- Ripening time
American Hazelnut vs. Filbert Hazelnut
American Hazelnut and Filbert Hazelnut are different hazelnut species, so their growing and germination requirements may differ.
This guide is specifically for American Hazelnut (Corylus americana). If you are growing Filbert Hazelnut, follow the germination instructions provided for that seed lot.
Browse all Hazelnut Seeds from Evergreen Seed Co.
Common American Hazelnut Germination Problems
Skipping Stratification
American Hazelnut seeds require a long cold period before reliable germination.
Cold stratify for the full 120–180 days.
Planting Too Shallow or Too Deep
Sow seeds approximately 1–2 inches deep.
Letting the Soil Dry Out
Keep the soil evenly moist during germination.
Overwatering
The soil should remain moist, but not waterlogged.
Giving Up Too Soon
Germination typically takes approximately 2–8 weeks after stratification and may be uneven.
Wildlife Disturbance
Squirrels and other wildlife may dig up planted nuts. Protect outdoor seed beds when necessary.
American Hazelnut Seed Germination FAQ
Do American Hazelnut seeds need to be soaked?
Yes. Soak seeds in water for 24 hours before cold stratification.
How long should American Hazelnut seeds be cold stratified?
Cold stratify for 120–180 days in a damp medium.
How deep should American Hazelnut seeds be planted?
Sow seeds 1–2 inches deep.
How long do American Hazelnut seeds take to germinate?
Expect germination in approximately 2–8 weeks after stratification.
Can American Hazelnut seeds be stratified in the refrigerator?
Yes. Keep the seeds in a damp medium in the refrigerator for the full 120–180 day stratification period.
Can American Hazelnut seeds be planted outdoors in fall?
Yes. Fall sowing can allow natural winter conditions to provide the cold period, although outdoor seed beds may need protection from wildlife.
Grow American Hazelnut from Seed
Soak 24 hours → Cold stratify 120–180 days in a damp medium → Sow 1–2 inches deep → Keep evenly moist → Germination in approximately 2–8 weeks
American Hazelnut takes patience to start from seed, but completing the full stratification period and maintaining consistent moisture gives the seeds the conditions they need for successful germination.