Germinating Chestnut Seeds: Cold Stratification and Planting Protocol

Chestnut seeds (**not nuts for eating**) require **strict cold, moist stratification** to break dormancy.

Storage (Fall–Spring)

• **Medium:** Moist peat moss or sand (squeeze handful—few drops water = perfect).
• **Container:** Perforated plastic bag or ventilated container.
• **Temperature:** **32–34°F (0–1°C)**. **Do not freeze.** Above 40°F = premature sprouting/rot.
• **Duration:** 3–4 months (typically Nov–Mar).
• **Monitor:** Radicles emerge late Feb–Mar. Plant **before root >1 in.** (fragile).

Planting (Spring)

1. **Pots:** Deep containers (1 gal+) to avoid root binding.
2. **Depth:** 1 inch, **root down** (or flat side down if no root).
3. **Media:** Well-drained potting mix.
4. **Care:** Bright light, consistent moisture. Transplant at 8 in. tall (~4 months).
5. **Site:** Full sun, well-drained, slightly acidic soil. Space 30–40 ft.

Critical

**Never let seeds dry out.** Desiccation = death. Refrigerator crisper drawer works if monitored.