BSFL Bin Kit — Black Soldier Fly Larvae Starter Kit

Free US shipping. Bin not included — the kit fits any plastic storage tote you already own.

Build your bin your way.

The Blue Grub Farms Bin Kit is a complete BSFL composting kit — everything you need to transform any standard plastic container (tote, bucket, etc.) into a highly efficient, self-harvesting Black Soldier Fly Larvae composting system. Design a system that fits your space, your materials, and your budget — or if building isn't your thing, go fully pre-built with the Grubhouse.

What's in the box

1. Prepupae Harvest Ramp: This specially designed ramp allows mature larvae (prepupae) to instinctively crawl out of the food source and up to a collection insert. It's the key to automatic, clean harvesting — no more sifting or digging. Newly redesigned to be sturdier and more durable, with a flared end that gives prepupae more surface to find and makes it easy to seat the ramp flush against the bin wall — where they naturally climb — without cutting the ramp hole into a corner.
2. Collection Insert: Sits outside your main bin, ready to receive the self-harvested prepupae from the ramp. Just lift and collect.
3. Adult Fly Entrance Pod (the "Bintrance"): Guides newly emerged adult Black Soldier Flies into the breeding area, helping to keep your colony contained and focused on reproduction. Now built taller with a canopy over the top, so rain and irrigation water can't run down into the fly entrance holes and soak your bin. The branches lock on with a secure nut joint for durability.
4. The "Egg Tree" Laying Surfaces: Modeled after nature, these surfaces — complete with decorative "leaves" — mimic the ideal narrow, protected spaces where female BSFL prefer to lay their eggs. This maximizes egg production, ensuring the constant, sustainable growth of your colony.

You'll also need

• A tote with a solid lid — the kit fits any size tote. I wouldn't go under 12 gallons, and if you go bigger than about 27 gallons you may want two kits. You provide the bin.
• Coco coir for bedding and moisture control. Not included, but we sell the bricks if you don't have some.
• Your initial starter batch of larvae, plus some organic waste to feed them.

Setup takes under an hour — read the setup guide before your kit arrives.

How it works

• Customize Your Colony: Use the container size and material that works best for your setup.
• Maximize Egg Laying: The proprietary Egg Tree design is proven to boost your colony's reproductive success.
• Automate Harvesting: The Prepupae Ramp lets your colony harvest itself — no digging, no sorting.
• Sustainable Loop: BSFL eat your kitchen scraps and produce nutrient-dense larvae plus frass. This kit closes the composting loop.

Recently improved. Based on real customer feedback, the kit got an overhaul: a taller entrance with a built-in canopy that keeps rain and irrigation water out of the fly holes, a locking-nut joint so the branches stay put instead of snapping off, and a sturdier harvest ramp with a flared end that seats easily against the bin wall — right where prepupae climb out.

Looking for a pre-built BSFL system? Check out the Grubhouse — a complete bin, built to order.

New to BSFL? Read the BSFL Guide or the Beginner's Guide to Black Soldier Fly Farming. Want to learn how to compost with BSFL? Here's the full walkthrough.