Knowledge from Olle Garden Bed: A Guide to Using an In-Ground Worm Compost Bin

Composting is a sustainable practice that transforms kitchen scraps and organic waste into nutrient-rich soil for your garden. While traditional composting methods, such as compost piles and bins, are effective, there's another innovative way to recycle organic materials - in-ground worm compost bins. These in-ground systems offer several advantages, including space efficiency, reduced maintenance, and the ability to create high-quality compost. In this article, we'll guide you through the steps of setting up and using an in-ground worm compost bin.The following content also has some reference value for raised garden beds.

worm bin

What Is an In-Ground Worm Compost Bin?

An in-ground worm compost bin is a subsurface composting system that utilizes the power of earthworms to break down organic matter. This method eliminates the need for above-ground compost bins and produces rich, fertile soil in the process. The concept is simple: you dig a hole in your garden, install the bin, and let earthworms do the work of decomposition.

Advantages of In-Ground Worm Composting

Space Efficiency: Unlike traditional compost bins that can take up a significant amount of space, in-ground worm compost bins are discreet and don't clutter your garden.

Minimal Maintenance: Once set up, these systems require little maintenance. Worms naturally migrate to where they find food, so you don't need to turn or aerate the compost.

Pest and Odor Control: In-ground composting minimizes the risk of attracting pests and pests, and odors are less likely to be a problem.

High-Quality Compost: Earthworms create some of the best compost available. Their castings are rich in nutrients and beneficial microorganisms.

Setting Up Your In-Ground Worm Compost Bin 

Now, let's get started with setting up your in-ground worm compost bin.

Materials you'll need:

A plastic or metal container with a lid (e.g., a plastic storage bin)

A drill with a 1/8-inch drill bit

A shovel

Organic bedding material (shredded newspaper, cardboard, or straw)

Earthworms (red wigglers are the most commonly used species)

Kitchen scraps and organic waste


Select a Location: Choose a suitable spot in your garden. The area should receive partial sunlight and be well-drained to prevent waterlogging.

Dig a Hole: Using a shovel, dig a hole that's about 2 feet deep and wide enough to accommodate your plastic or metal container. The hole should be big enough to comfortably fit the container while leaving a few inches of space around it.

Drill Holes in the Container: To allow for air circulation and drainage, drill holes in the sides and bottom of your container.

Prepare the Bedding: Fill the container with organic bedding material. This will serve as the initial bedding for the worms. Dampen the bedding with water until it's about as moist as a wrung-out sponge.

Add Worms: Place your earthworms on top of the bedding. Initially, start with about 1,000 worms, and they will reproduce over time.

Cover with Kitchen Scraps: Begin adding your kitchen scraps and organic waste to the container. Bury the waste beneath the bedding to prevent odors and attract worms to the food source.

Place the Container in the Hole: Position the prepared container in the hole you dug. Leave the lid slightly ajar to allow for ventilation. Cover the hole with a lid or board to protect it from extreme weather conditions and pests.

Maintain the Compost Bin: Continue to add kitchen scraps regularly, and the worms will transform the waste into nutrient-rich compost. Monitor the moisture level, ensuring that the bedding remains consistently damp but not waterlogged.

Harvest Compost: After several months, you can harvest the compost by scooping it from the container and adding it to your garden.

raised garden beds


In-ground worm compost bins are a fantastic way to recycle kitchen scraps and organic waste while enriching your garden soil with valuable nutrients. By following the steps outlined in this guide, you can create a low-maintenance, space-efficient, and environmentally friendly composting system that yields high-quality compost for your garden. Give it a try and experience the benefits of harnessing nature's recycling power in your backyard.