Worm Composting Bins


Find the best wormery for you and your composting worms.

Worm composting bins come in numerous shapes and sizes. Worms will live anywhere their vital environmental conditions are met and some people are very creative in worm bin design. I’ve seen some extremely elaborate worm bins posted on the web. Whatever design you decide to go with, remember the basics.

Listed below are the most popular and functional worm composting bins available. Review your worm composting bin options and choose the worm bin that is right for you.

Stackable worm bins like Can-O-Worms and Worm Factory

Stackable worm composting systems are very popular because of their worms to space ratio. They hold a lot of composting worms and require very little space. These worm composting bins are designed to allow for the natural upward migration of the worms.

Worm Composting Bin

Worm composting bins like the Can-O-Worms, allow for a perfect worm habitat.

These systems are 3, 4, or 5 interlocking trays in depth and allow the worms to remain undisturbed while you harvest the vermicompost. The principle is simple: Composting worms will naturally migrate upwards toward the new bedding and food. Once they all migrate up through the holes in each tray, you harvest the remaining castings in the tray(s) below and then add the empty tray to the top of the stack.

Pro’s
  • Worm bins hold 10,000 to 20,000 composting worms, depending on number of tray layers.
  • Natural separation of worms from vermicompost provides for undisturbed worm habitat.
  • Built in spigot provides excellent drainage for “worm tea”.
  • Can be used indoors or outdoors.
Con’s
  • Cost between $75 and $200

Best Worm Composting Bins for Classroom or Home

Stackable worm composting bins
Rubbermaid Worm Composting Bin

Rubbermaid worm bins are easy to make and inexpensive, but lack the capacity and aesthetics of a more expensive worm bin.

Rubbermaid worm bins

These worm bins are a great way to start vermicomposting. For just a few dollars, you can have a personal wormery in your home, garage, apartment, or office. Rubbermaid worm bins are very popular, easy to maintain, and inexpensive. Fill the bin with bedding and add food scraps. Each bin holds 2,000 to 2,500 worms. Harvest vermicompost and start with fresh bedding every 3-4 months.

Pro’s
  • Inexpensive and simple design.
  • Requires very little space.
  • Easy to clean and maintain.
Con’s
  • Can become too wet if you’re not careful.
  • Requires separation of worms from vermicompost every 3 to 4 months which disturbs worm habitat.

Make your own worm composting bin

OSCR Worm Composting Bin

The OSCR flow through worm bin. Plans are sold and licesnsed through VermiCo.

Flow through worm bins

The premise of a flow through worm bin is simple. The worm bin has 2 chambers, a digesting chamber (above) where the worms live, and a harvesting chamber (below) where you harvest your vermicompost. These chambers are separated by a screen that allows processed vermicompost to flow though, while unfinished material and worms stay above in the digesting chamber.

These systems can be optionally heated, which means you can keep your worms active all winter long by maintaining temperatures.

Two of the most functional flow though worm bins are the Worm Wigwam and the OSCR.

The OSCR is a wood worm composting bin that you build. The blueprints and site license cost $50 and are purchased through VermiCo. The plans and materials should total less than $200 for the entire system.

Worm Wigwam worm composting bin

The Worm Wigwam is a large operation worm composting system that is perfect for restaurants.

The Worm Wigwam
is designed as an industrial system, which works great for restaurants and other environmentally conscious businesses.

Both systems work very well. They are low maintenance and high yield. The Worm Wigwam is more expensive, but it pre-built and ready to use. However, if you have some basic carpentry skills and want to have some fun, the OSCR is an exciting option.