18+ ONLY • Seeds sold exclusively as adult novelty souvenirs • No germination permitted in the UK
1. The Golden Rule: Cool, Dark, Dry, Airtight
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Ideal UK conditions:
• Temperature: 4–8 °C (fridge door or wine cooler)
• Humidity: 5–9 % RH (silica gel mandatory)
• Light: Complete darkness (opaque jar)
• Oxygen: Minimal (vacuum seal or airtight)
Seeds stored this way stay viable for 10+ years with almost no loss.
2. The UK Collector’s “Fridge + Vacuum” Method
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5-minute method used by every serious collector:
1. Keep in original breeder pack or small ziplock
2. Add 1–2 silica gel sachets
3. Seal in airtight jar or vacuum bag
4. Label with strain + date
5. Store in fridge door (never freezer unless vacuum-sealed)
Keeps genetics perfect for a decade or more.
3. The Four Enemies of Seed Viability
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Heat (>25 °C) – ages seeds fast
Moisture (>12 % RH) – causes mould
Light – degrades seed coat
Oxygen – oxidises oils over time
Never store in a warm drawer, car, or clear bag.
4. Long-Term Storage (10–20+ Years)
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Seed-bank method:
• Vacuum-seal with oxygen absorber + silica gel
• Double-bag in Mylar
• Store at 4 °C (fridge) or –18 °C (freezer for 20+ years)
Used by professional collectors worldwide.
5. Quick UK Collector Checklist
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- Original breeder pack or airtight tube
- Silica gel packet (replace every 2 years)
- Vacuum jar or Mylar bag
- Fridge door (4–8 °C)
- Label with strain + date
Reminder: All cannabis seeds are sold exclusively as adult novelty souvenirs.
Germination is illegal in the UK without a Home Office licence.