Storing Cannabis Seeds Properly
Bad storage is the #1 cause of poor germination.
TL;DR: 4–8 °C, 20–30 % RH, dark, airtight. Fridge + vacuum foil + silica.
Three enemies
Humidity >40 % activates enzymes, heat >20 °C accelerates aging, light triggers germination sensor.
Optimal conditions
4–8 °C fridge crisper, 20–30 % RH, silica gel, tinted glass.
Step-by-step
Seeds in original cell pack or small zip bag, then into small labeled glass with silica gel, then fridge crisper drawer.
FAQ
How long do cannabis seeds last?
Optimally stored: 5 years at 90 % germ rate, up to 10 years at 60–70 %.
Can I freeze seeds?
Yes at -18 °C. Vacuum first and acclimate before germinating.