Seed storage

Factors that influence germination:

• Kind
• Quality in collection
• Conditions between collection and storage
• Storage conditions

Ideal storage conditions:

• Temperature: 0–5°C
• Relative humidity (RH): 25–30%
• Store in a cool, dry and dark place
• Avoid fluctuations in temperature and humidity
• Protect from light (opaque packaging or dark place)

Rules for seed storage:

• Harrington's rule:
  • +1% moisture in seed = 50% shorter lifespan
  • +6°C (10°F) temperature = 50% shorter lifespan
• James' rule (rule of 100):
  • Temperature (°F) + RH (%) ≤ 100

Important when opening packaging:

• From cold storage → wait 24 hours before opening (to prevent condensation)
• Opened and put back in storage → Let stand for 24 hours so that moisture content can recover

NB:

• Treated seeds (coated, primed) have a shelf life of up to several months → sow directly