How Long Do BSFL Last in the Fridge?
Matt GorenShare
How Long Do BSFL Last in the Fridge?
2-3 weeks at 50-55°F. Black soldier fly larvae enter a dormant state in the refrigerator, dramatically slowing their metabolism. No feeding, watering, or maintenance is required during storage. Simply place the container in the fridge and pull out what you need when it is time to feed.
| Storage Location | Temperature | How Long They Last |
|---|---|---|
| Refrigerator | 50-55°F | 2-3 weeks |
| Cool room/basement | 55-65°F | 1-2 weeks |
| Room temperature | 70-80°F | 5-7 days (will darken/pupate) |
| Freezer | Below 32°F | DO NOT FREEZE — kills them |
Tips for Maximum Shelf Life
- Use the right fridge zone. The door shelf or a middle shelf works well. Avoid the coldest zones (back bottom) where temperatures may drop below 45°F.
- Keep the container ventilated. A few small holes in the lid prevent CO2 buildup.
- Check weekly. Remove any dark/dead larvae to prevent them from affecting healthy ones.
- Warm before feeding. Let BSFL reach room temperature for 10-15 minutes before offering. Warmer larvae wriggle more, triggering better feeding responses.
Signs They Are Going Bad
- Darkening to brown/black: Entering pre-pupal stage. Still edible — feed promptly.
- Strong odor: Dead larvae decomposing. Remove dead ones, use remaining healthy larvae immediately.
- No movement after warming: May be dead. Healthy BSFL resume wriggling within 10-15 minutes of warming.
Compared to Other Feeders
BSFL shelf life (2-3 weeks, fridge, zero maintenance) is better than hornworms (5-10 days, grow fast) and silkworms (1-2 weeks, need food). It is shorter than discoid roaches (months at room temperature) but requires zero effort — no feeding, no water crystals, no bin maintenance.
Order from our BSFL collection with confidence — they will last weeks in your fridge.
— Matt, Founder, All Angles Creatures
