Growing Dogwood Trees from Seed: Chill Requirements

Cold Stratification Varies by Species

Dogwood (Cornus spp.) seeds generally need cold stratification, but the duration depends on the species and local climate. In Middle Tennessee (zone 6b-7a), native dogwoods experience enough natural chilling (400-800 hours below 40°F) to germinate without artificial treatment.

Two Reliable Methods

Natural Outdoor Stratification (Easiest)

1. Collect ripe red drupes in fall.
2. Remove fleshy pulp—soak and rub clean.
3. Plant seeds ½ inch deep in a prepared seed bed or outdoor pots.
4. Cover with hardware cloth to prevent rodent digging.
5. Seeds germinate naturally in March-April.

Artificial Refrigerator Stratification

1. Place cleaned seeds in a damp paper towel inside a sealed plastic bag.
2. Refrigerate (35-40°F) for 90-120 days.
3. Check periodically for mold; rinse if needed.
4. After stratification, sow in pots at 70-75°F.
5. Germination in 2-4 weeks.

Important Notes

• Pink dogwoods are cultivars—seedlings will be white-flowered, variable forms.
• Native Cornus florida seeds have lower chill requirements than northern species.
• Protect young seedlings from deer and rabbits.

Either method works well in your area. The outdoor approach is simpler and mimics nature perfectly.