How to Compost in a Bucket | Small-Space Composting

Composting in a bucket turns kitchen scraps into soil-friendly compost using a 5-gallon container with air holes and layered browns and greens.

Composting in a bucket is the easiest way to turn kitchen scraps into rich, usable compost when a full backyard pile isn’t an option. A basic 5-gallon bucket with a tight lid, plenty of air holes, and the right mix of browns and greens produces dark, crumbly compost in roughly 5–7 weeks. The whole method comes down to airflow, moisture, and balance.

What You Need For Bucket Composting

The standard setup is a clean 5-gallon bucket with a tight-fitting lid, placed outdoors and out of direct sunlight. Before you add anything else, drill holes for ventilation and drainage: roughly 10–15 holes in the lid, 15–20 around the sides, and 10–15 in the bottom. Some guides recommend 30–50 total holes, which works fine as long as air can move through the pile.

Start with a layer of sticks or twigs at the bottom. That layer keeps the drainage holes from clogging as the compost breaks down. From there, you alternate layers of browns and greens at about a 3:1 ratio by volume.

• Browns: leaves, cardboard, paper products, twigs, and other carbon-rich materials
• Greens: kitchen scraps and other nitrogen-rich organics

Keep the mix damp like a wrung-out sponge. Too much water makes it soggy; too little stops decomposition. After each addition, cover the bucket and roll or shake it to mix the contents.

How Long Does Compost Take In A Bucket?

Keep adding scraps and mixing until the bucket reaches about three-quarters full, then stop. Let the pile finish, continuing to rotate or shake it every other day and checking moisture as you go. You’ll know it’s done when the contents look like dark, crumbly soil with no recognizable food scraps left.

Don’t fill the bucket past the 3/4 mark. Airflow drops, decomposition slows, and odors pick up. The same thing happens if you skimp on air holes or let the drainage layer clog.

Bokashi Buckets Work Differently

A bokashi bucket is not the same as an aerobic compost bucket, and mixing up the two methods causes most beginner failures. Bokashi uses a tight-fitting, airtight lid and typically has holes only in the bottom because it ferments anaerobically rather than composting with oxygen.

Once a bokashi bucket is full, you leave it sealed and undisturbed until the ferment stage completes. It produces fermented precompost that must be buried or added to another compost system to finish breaking down. The University of Saskatchewan’s gardening resources cover the bokashi process in detail, including how it differs from aerobic methods.

For basic aerobic bucket composting, skip the meat, dairy, and oils. They smell, attract pests, and slow the balance of the pile. Bokashi systems tolerate more food waste, but they still depend on a sealed, managed fermentation process to work safely.

Common Bucket Composting Mistakes

Most failed bucket composts trace back to a handful of fixable errors. Avoid these and your bucket will behave.

• No lid or a poor fit: invites pests and lets the pile dry out
• Too few air holes: aerobic compost needs oxygen or it turns anaerobic and smells
• Too much water: soggy contents slow down and rot instead of composting
• Too many greens: raises odor risk and throws off the carbon-nitrogen balance
• Filling past 3/4 full: cuts airflow and makes mixing harder

The 3:1 brown-to-green ratio is the most common guidance, though some sources suggest 2:1. Either works; err on the side of more browns if you’re unsure.

If you’re starting fresh and want a purpose-built container, our roundup of the best 5-gallon compost buckets compares tested models with the right lid and drainage setups for this method.

For a thorough overview of the layering and moisture steps, the Queensland Government’s guide to effective composting walks through the same principles at garden scale and confirms the brown-to-green balance that keeps piles healthy.