Seed Storage Guide

Why Proper Storage Matters

Seed viability declines over time, but proper storage can significantly slow this process. Seeds stored correctly can remain viable for years, saving money and preserving rare or heirloom varieties.

The Three Keys to Seed Storage

Seeds are living organisms in suspended animation. Three factors affect their longevity:

• Temperature: Cooler is better. Each 5┬░C decrease roughly doubles seed life.
• Moisture: Low humidity prevents mold and premature sprouting.
• Light: Darkness prevents light-triggered germination.

Short-Term Storage (1-2 Years)

• Keep seeds in original packets
• Store in airtight container with desiccant
• Place in cool, dark cupboard
• Temperature: 15-20┬░C (59-68┬░F) acceptable

Long-Term Storage (3+ Years)

1. Dry seeds thoroughly: Spread on paper towels for 3-5 days in dry air
2. Add desiccant: Silica gel packets or powdered milk in cheesecloth
3. Seal airtight: Use vacuum-sealed bags or mason jars with tight lids
4. Refrigerate: Store at 1-5┬░C (34-41┬░F)
5. Label clearly: Include variety name, date harvested, and any pre-treatment

Seed Viability by Species

What to Avoid

• Kitchen cabinets near stove (heat and humidity fluctuations)
• Garage or shed (temperature extremes)
• Near windows (light and heat)
• Plastic bags that trap moisture
• Freezer (unless seeds are properly dried first)

Freezing Seeds

For very long-term storage (10+ years), some seeds can be frozen. However:

• Seeds must be dried to 5% moisture content first
• Use airtight, moisture-proof containers
• Add desiccant to absorb any condensation
• Do not open container until it reaches room temperature
• Not all seeds tolerate freezing ΓÇö test first