Why it works
Blue Grub Farms
The Grub Escape — BSFL Self-Harvesting Ramp
When BSFL are ready to harvest, they'll do the work for you. The Grub Escape just gives them somewhere to go. Black Soldier Fly prepupae have a built-in instinct — when they're fat and ready to pu...
$29.99
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Printed in Aurora
Every part is designed in our backyard and printed in PETG at our small farm in Aurora, CO.
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Made to order
We print to fulfill — no warehouse of plastic sitting around. Ships within 7 days of your order.
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Real support
Stuck? Email us. We farm BSFL ourselves, and we'd rather help you succeed than ship you replacements.
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Circular by design
Insect farming recycles organic waste into protein and fertilizer — the most sustainable feed on earth.
Build your bin your way.
When BSFL are ready to harvest, they'll do the work for you. The Grub Escape just gives them somewhere to go.
Black Soldier Fly prepupae have a built-in instinct — when they're fat and ready to pupate, they migrate upward and out of the bin on their own. The Grub Escape is a self-harvesting ramp that takes advantage of exactly that. Mount it to your bin, set a collection container underneath, and let them walk themselves right into it. No digging through substrate. No manual sorting. Just a pile of ready-to-harvest larvae waiting for you.
How it works: The ramp fits standard tote-style bins and mounts with the included hardware. As prepupae mature, they climb the ramp and drop into your collection container — a bowl, a bucket, whatever you're using. That's it. The biology does the harvesting.
- Self-harvesting — uses BSFL's natural prepupal migration instinct
- No manual digging or sorting required
- Mounts to standard tote bins — hardware included
- 3D printed in PETG for durability and easy cleaning
- Works as a standalone upgrade or alongside any BGF setup
- Also included in the BSFL Bin Kit — no need to buy separately
What's included: The Grub Escape ramp + all mounting hardware. Made to order in Aurora, Colorado.
Want more eggs going into the bin the ramp harvests out of? Pair it with the Tree of Life oviposition system to boost egg-laying at the front end.
The Grub Escape is included in the BSFL Bin Kit. If you already have a Bin Kit, you're covered.
40× more calcium than mealworms
BSFL have a calcium-to-phosphorus ratio ideal for reptiles, amphibians, and birds — no dusting required.
Self-harvesting
When prepupae are ready, they migrate up the ramp on their own. You just collect the jar.
Zero waste
BSFL eat your kitchen scraps. Frass left behind is a rich organic fertilizer for your garden.
Made in Aurora, CO
Every part is 3D-printed to order. PETG — food-safe, durable, and recyclable.
Ready to close the loop?
