A simple DIY compost tumbler can be made from a food-grade plastic barrel mounted horizontally on a wooden frame. The key is to provide ventilation, keep the barrel securely supported, and make it easy to rotate.
1 galvanized steel pipe or threaded rod, about ¾–1 inch diameter, long enough to pass through the barrel
2 sturdy wooden supports, such as 4×4 posts
2–4 heavy-duty bearings or low-friction supports
Exterior-rated screws/bolts
2–3 heavy-duty hinges
1 latch
Drill and hole saw
Saw
Several small drill bits
Optional: exterior paint/sealant for the wooden frame
Important: Use a barrel that previously held food or another non-toxic substance. Don't repurpose a barrel that contained pesticides, solvents, fuel, or other hazardous chemicals.
Build it
1. Prepare the barrel
Wash it thoroughly and remove any residue.
Drill ventilation holes around the barrel—roughly ¼–½ inch holes spaced several inches apart. You want plenty of air exchange without making holes so large that compost falls out.
Cut a rectangular access door into the side of the barrel. Make it large enough to add material and remove finished compost.
Attach the cut section back with two hinges and a secure latch. The latch matters: a loose door can open when you rotate the tumbler.
2. Install the axle
Find the center of both circular ends of the barrel and drill holes just large enough for your steel rod/pipe.
Push the rod all the way through the barrel.
Inside the barrel, you can add 2–4 mixing fins. These can be strips of treated lumber or plastic bolted securely to the inside wall. They lift and mix the material as the barrel turns.
3. Build the stand
Make two sturdy A-shaped or rectangular wooden supports, one for each end of the barrel.
The axle should sit approximately waist height, making the tumbler comfortable to rotate.
Mount bearings on the supports if you're using them. Otherwise, you can make simple metal/plastic supports that the axle rests on, although bearings will make a loaded barrel substantially easier to turn.
Make the frame very sturdy—a full barrel can be surprisingly heavy. OSU Extension specifically recommends paying attention to the sturdiness of a tumbler's support and rotating mechanism.
4. Put it together
Set the barrel's axle onto the supports and check that it spins freely.
Give it several test rotations before adding compost. If it wobbles badly, reinforce the frame or adjust the axle.
Start with a mixture of "browns" such as dry leaves, shredded cardboard, or straw and "greens" such as vegetable scraps and fresh grass clippings.
Don't pack it tightly. The material needs air.
Add a little water if the contents are dry. You're aiming for material that is damp, but not dripping wet. If it becomes wet or smelly, add more dry carbon-rich material and turn it.
Rotate the tumbler daily or at least several times a week.
A useful trick is to put a layer of dry leaves or straw in the barrel before adding kitchen scraps; these absorb some of the excess moisture from food waste.
One improvement I'd strongly recommend
If you have enough space, build two barrels or two compartments. Use one for fresh material while the other finishes composting. Extension guidance also recommends this approach because it lets one batch remain undisturbed while you continue adding new material to the other.
If you'd like, I can also give you a $50-ish version using a 55-gallon barrel, with exact cuts and dimensions for the wooden frame.
Building a DIY compost tumbler is a budget-friendly way to accelerate composting through easy aeration . A popular and sturdy method involves using a 55-gallon food-grade plastic drum and a simple wooden frame.
Watch this guide for a visual breakdown of constructing a budget-friendly barrel tumbler:
Building a DIY rotating compost tumbler using a heavy-duty plastic storage barrel or trash can is one of the easiest ways to accelerate decomposition . An elevated barrel design keeps pests out and makes mixing effortless.
Here is a straightforward guide to building a 55-gallon plastic drum/barrel tumbler on a simple wooden or metal frame.
Materials & Tools Needed
55-gallon food-grade plastic drum or heavy-duty plastic trash can with a locking lid
Sturdy metal rod or PVC pipe (about 1 inch in diameter and 3-4 feet longer than your barrel) to act as the axle
Lumber (2x4s) or structural timber to build an H-frame or A-frame stand
Drill with a large drill bit (for ventilation/drainage) and a spade bit (to match your axle width)
Galvanized screws and hardware (nuts, washers if using a metal pipe)
Jigsaw or utility knife
Hasp latch or bungee cords (to secure the lid tightly during spinning)
ChatGPT Search· Sep 17, 2026
A simple DIY compost tumbler can be made from a food-grade plastic barrel or sturdy lidded trash can mounted on a rotating axle. The key is to provide ventilation, drainage, and an easy way to turn the contents.
What you'll need
30–55 gallon food-grade plastic barrel with a tight lid
1/2-inch galvanized steel or PVC pipe, about 4–5 ft long
Two sturdy brackets or pillow-block bearings
Lumber for a simple stand, such as 2×4s
Drill with a 1/4–1/2-inch bit
Bolts, washers, and nuts
Two hinges and a latch, if your barrel doesn't already have a secure lid
Optional: a thermometer
A barrel around 30–50 gallons is a manageable size for a backyard tumbler. Wisconsin Extension recommends drilling ventilation holes in the sides and holes in the lid and bottom for airflow and drainage.
Build it
1. Prepare the barrel
Google AI Mode· Sep 13, 2026
Building a DIY compost tumbler using a 55-gallon plastic food-grade drum is a satisfying weekend project that keeps waste out of landfills and gives you rich compost fast.
Materials & Tools Needed
A 55-gallon plastic drum/barrel (preferably food-grade with a lid or bung holes)
Sturdy wood (2x4s and 2x6s or 2x10s for the frame)
A metal or PVC axle rod (long enough to run through the center of the drum plus clearance for the frame)
Caster wheels or a pivot mount (depending on whether your drum spins on an axle or sits on rollers)
Hinges, a latch, and weather stripping (for the access door)
Tools: Cordless drill, drill bits, jigsaw or utility knife, measuring tape, and safety glasses
ChatGPT Search· Sep 13, 2026
A simple 55-gallon food-grade plastic barrel + axle + wooden stand is one of the easiest DIY compost tumblers. The basic design is well-established: holes provide airflow, a rod through the center acts as the axle, and the barrel rotates in a simple frame.
What you'll need
1 food-grade plastic barrel or drum, about 40–55 gallons
1 galvanized steel pipe or sturdy metal rod, roughly ½–1½" diameter and slightly longer than the barrel
2×4 or 2×6 lumber for the stand
Exterior screws/bolts
2 hinges and a sturdy latch
Drill and drill bits
Jigsaw or reciprocating saw
Measuring tape and marker
Optional: 2–3 pieces of PVC pipe or scrap metal for internal mixing fins
ChatGPT Search· Sep 9, 2026
A simple backyard compost tumbler can be made from a plastic barrel (or trash can), a few pieces of hardware, and a basic frame. The goal is to create a container that holds compost while allowing you to rotate it to add oxygen.
Materials
1 food-grade plastic barrel or sturdy trash can with a lid (around 30–55 gallons works well)
1–2 pieces of galvanized pipe or a sturdy metal rod for an axle
2×4 lumber for a support frame
Screws
Drill and drill bits
Hinges or a latch for an access door (optional but convenient)
Building a simple backyard compost tumbler is a great DIY project. A popular and easy method uses a heavy-duty plastic storage bin or trash can mounted on a frame or axis so it can spin easily.
Materials & Tools Needed
Plastic storage drum or heavy-duty trash can (30 to $50, preferably with a tight-fitting lid)
Length of PVC pipe or steel rebar (about 3 feet longer than the width of your bin)
Sturdy wood or cinder blocks to build a support frame
Screws and brackets
Drill with a large bit for aeration holes
Hole saw or paddle bit matching the diameter of your pipe/bar
Step-by-Step Instructions
Prepare the container: Drill multiple 1 4 one-fourth 1 4 -inch to 1 2 one-half 1 2 -inch holes around the sides and ends of the trash can for airflow and excess moisture drainage.
Google AI Mode· Sep 5, 2026
Building a DIY compost tumbler is a fantastic weekend project that keeps compost aerated with minimal heavy lifting. A standard design uses a 30-to-50-gallon plastic storage drum or a clean trash can mounted on an axle.
Materials & Tools Needed
Container: One 30-to-50-gallon heavy-duty plastic drum, barrel, or locking-lid trash can (dark colored is best to absorb heat).
Frame Base: Pressure-treated lumber (2 × 4s) or sturdy scrap metal to build an H-frame or A-frame stand.
Axle: A piece of steel rebar, a thick galvanized steel pipe, or a sturdy wooden dowel longer than the width of your stand plus the barrel.
Hardware: Two heavy-duty flange bearings or pre-drilled holes reinforced with washers, nuts, and bolts to secure the axle through the barrel's center.
Ventilation: A power drill with a 1/4-inch drill bit for airflow holes.
Access Door: A small section cut out of the barrel side, hinged back on with a latch or bungee cord to keep it secure while tumbling.
Step-by-Step Instructions
Clean the inside thoroughly. Mark and cut a hatch for adding scraps and harvesting finished compost. Attach hinges and a latch to the cutout piece so it seals tightly.
ChatGPT Search· Sep 5, 2026
A simple DIY compost tumbler can be made from a food-grade plastic barrel or drum, an axle, and a basic wooden frame. A 30–55 gallon drum is a good backyard size.
What you'll need
1 food-grade plastic drum, roughly 30–55 gallons
1 galvanized steel pipe or solid metal rod, about 1½–2 inches in diameter and slightly longer than the drum
2×4 lumber for the support frame
4–6 sturdy bolts, washers, and nuts
Hinges and a latch for the access door
Drill and ½-inch drill bit
Saw, measuring tape, and basic hand tools
Optional: exterior-grade paint if the drum is light-colored
A 55-gallon drum mounted horizontally on a wooden frame is a well-established DIY design.
Build it
1. Prepare the drum
Sources AI cites
21% of citations to these sources link to brands' own websites.
How To Make A Compost Tumbler (Fast, Cheap and Easy)1.8M views · 14 years agoYouTube · TheCrunchyHousewife
Materials and Tools
55-gallon plastic drum (preferably food-grade; make sure to wash it out thoroughly)
Sturdy lumber (such as 2 × 4 or 2 × 6 boards to build the support stand)
Steel or PVC pipe to act as the central axle running through the barrel
Hardware: Hinges, a latch/lock for the door, screws, washers, and nuts
Tools: Drill with various bit sizes, jigsaw or utility knife, and a tape measure
Step-by-Step Construction
Prepare the Barrel and Hatch: Locate the exact center/halfway point on opposite sides of the barrel. Draw a hatch door roughly 10 in × 14 in on the side of the drum.
Install Door Hardware: Before cutting the door completely loose, attach your hinges and latch across the outline so the door aligns perfectly and doesn't warp. Then, finish cutting out the opening with a jigsaw or utility knife.
Drill Aeration and Drainage Holes: Use a 1/4-inch or 1/2-inch drill bit to make airflow holes spaced evenly around the barrel. Add a few smaller holes at the bottom/sides for excess liquid drainage.
Create the Axle Pass-Through: Drill a centered hole straight through the middle of both end caps (top and bottom) or sides of the drum, depending on whether you want a horizontal or vertical spin design, and slide your steel/PVC axle pipe straight through. Secure it tightly with flanges or bolts.
Build the Stand: Construct an A-frame or rectangular wooden stand out of your lumber tall enough to let the barrel clear the ground with room to spin. Drill resting notches or axle holes at the top of the frame.
Mount the Barrel: Rest the axle ends securely into the stand's support notches, making sure the drum rotates smoothly before adding any material.
Would you like advice on how to balance green and brown materials to get your new tumbler started, or do you need help modifying the frame design?
Prepare the Frame Stand
Build an A-frame or two sturdy paired legs out of your 2x4 lumber that will stand roughly 3 to 4 feet tall. Drill a hole through the top center of each support post using a spade bit slightly larger than your axle pipe. Secure the legs with galvanized screws so it stands rigid and stable.
Mark and Drill the Axle Path
Find the exact center of the top and bottom (or opposite ends) of your plastic barrel. Mark the center points and drill a hole straight through the middle of both ends just wide enough for your metal rod or PVC axle pipe to slide through.
Drill Aeration Holes
Compost needs oxygen to break down quickly without turning into a stinking mess. Drill 1/4-inch or 3/8-inch holes all around the sides and ends of the barrel. Space them about 3 to 4 inches apart, keeping a few rows closer to the ends for excess liquid drainage.
Install the Axle and Secure the Drum
Slide your metal rod or PVC pipe straight through the center holes of the barrel. Secure it tightly inside the drum (using washers and nuts if it's threaded, or locking pins if it's a smooth rod) so the barrel doesn't wobble or slide sideways independently of the pipe.
Mount the Barrel onto the Frame
Lift the assembly and rest the protruding ends of the axle pipe into the holes drilled into your wooden A-frame stands. Spin the barrel freely on the frame to test that it rotates smoothly even when balanced or nudged.
Check the Access Hatch
Ensure the main lid of your barrel or trash can has a secure locking mechanism (like a screw-on lid, heavy latches, or heavy-duty bungee cords) so it won't pop open and spill kitchen scraps when inverted mid-spin.
Watch this video to see how a similar DIY tumbling barrel setup goes together from scratch:
Loading and Using Your Tumbler
Balance the Ratio: Add a 3:1 ratio of brown materials (dry leaves, shredded cardboard, straw) to green materials (fruit/veg scraps, coffee grounds, fresh grass clippings).
Keep it Moist: The contents should feel like a damp sponge. Add a splash of water if it looks too dry.
Give it a Spin: Rotate the tumbler 2 to 3 times every week to aerate the contents and speed up microbe activity. Finished compost should be ready in 6 to 8 weeks
Would you like tips on troubleshooting wet/smelly compost or advice on the best high-nitrogen vs. carbon materials to put inside?
Thoroughly clean the barrel. Don't use a barrel that previously contained pesticides, solvents, fuel, or other toxic chemicals.
Drill several rows of holes around the sides, roughly 1/2 inch in diameter and spaced several inches apart. Add a few holes in the lid and bottom.
The holes provide the oxygen microorganisms need and allow excess water to escape. Composting is an aerobic process, so adequate oxygen is important.
2. Install the axle
Drill a hole straight through the barrel, passing through the center of both ends.
Push your pipe through the holes so it becomes the axle. Secure it with large washers and nuts or other suitable fittings so the barrel can't slide sideways.
Tip: Put the axle approximately through the barrel's center of gravity. It'll be much easier to rotate when full.
3. Build the stand
Make two sturdy wooden A-frames or vertical supports, one at each end of the barrel.
Mount a bearing/bracket on each support so the axle can rotate freely.
You want the barrel to sit roughly 12–18 inches above the ground, giving you enough clearance to rotate it and potentially place a container underneath.
4. Make the access door
If the barrel doesn't have a convenient large opening, cut an approximately 12×12-inch panel into its side.
Attach it with hinges and install a secure latch.
Round or cover the cut edges so you don't have sharp plastic edges.
5. Test the rotation
Before adding compost, give the barrel several spins.
It should rotate smoothly without rubbing against the stand. If it's difficult to turn empty, it'll be much harder when full.
Fill it correctly
Think roughly 3 parts browns to 1 part greens by volume:
Water: enough to keep everything about as damp as a wrung-out sponge
EPA recommends roughly two to three times as much carbon-rich material as nitrogen-rich material for backyard composting.
Cut larger scraps into smaller pieces; smaller particles generally decompose faster.
Don't fill the tumbler completely. Leave plenty of empty space so the contents can tumble and mix.
Using the tumbler
Give it a few rotations every day or two. You don't need to spin it constantly—the purpose is to redistribute material and introduce oxygen.
If it smells rotten or unpleasant, it's usually too wet or lacking oxygen. Add dry leaves/cardboard and tumble it. If it's very dry and decomposition has slowed, add a little water.
For a backyard tumbler, don't put meat, bones, dairy, grease, or pet waste in it; these can create pest problems and generally aren't suitable for small backyard systems.
An easy starter recipe
For your first batch, try:
2 buckets of shredded dry leaves + 1 bucket of vegetable scraps + a small amount of water
Tumble it thoroughly. Then keep adding scraps while adding roughly 2–3 times as much dry material to balance them.
Finished compost should be dark, crumbly, and earthy-smelling. EPA notes that a well-maintained backyard compost system can produce finished compost in roughly 3–5 months, although conditions and materials make the timing variable.
If you want the cheapest possible version, you can simplify this further to a $20–30 plastic-trash-can tumbler using scrap lumber and a piece of pipe.
Prep and Clean the Barrel: Wash out the 55-gallon drum thoroughly, especially if it previously held food ingredients or safe non-toxic materials.
Mark and Drill the Axle Hole: Find the exact center point on both opposing ends (bottom and top) or the sides of the barrel. Drill a hole straight through the center dimensions matching your metal rod or PVC axle.
Create the Access Door: Draw a square or U-shape hatch (roughly 10 in × 14 in) on the side of the barrel. Carefully cut out three sides using a jigsaw or utility knife, leaving the fourth side intact or attaching heavy-duty hinges. Secure it with a rust-resistant slide bolt or latch so it stays closed while tumbling.
Drill Aeration Holes: Composting requires oxygen. Drill numerous small holes (≈1 4 i n c h t o 1 2 i n c h ) around the perimeter of the drum and along the center axle pipe if it's hollow and perforated. Avoid making them too large so small scraps don’t fall out.
Build the Wooden Stand: Construct an H-frame or a box-style stand out of your 2x4 and 2x6 timber to comfortably cradle the barrel. Ensure it is square, level, and heavy enough not to tip over when the barrel is loaded and spinning.
Mount the Drum: Slide your axle rod through the barrel, securing it with washers and nuts on both ends, then rest or mount the axle securely onto your wooden frame. Alternatively, mount caster wheels to a base so the barrel can rest on top and rotate freely.
Would you prefer a design where the barrel spins on a center metal axle , or one that rests on rollers/casters ? I can give you precise measurements for either framework.
Important: Don't use a barrel that previously contained pesticides, solvents, petroleum products, or other toxic chemicals. A food-grade barrel is the safest choice.
Build it
1. Make the barrel
Wash the barrel thoroughly and let it dry.
Mark the exact center of both ends and drill holes just large enough for your axle. The axle needs to pass straight through the barrel.
Then drill ventilation/drainage holes around the barrel. For a simple design, ¼–½" holes spaced several inches apart work well. Put holes around the sides and some on the bottom; the goal is airflow without allowing the compost to fall out.
2. Add a loading door
On the side of the barrel, mark an opening roughly 10×14 inches.
Drill holes at the corners, then cut between them with a jigsaw. Keep the cut-out piece—you can turn it into the door.
Attach it with two hinges and a sturdy latch. Use bolts and washers rather than relying solely on screws through the plastic; the washers spread the load and make the attachment much stronger.
3. Add mixing fins
Inside the barrel, attach two or three strips of PVC, aluminum, or treated lumber running lengthwise.
They act like paddles: when you rotate the barrel, they lift and tumble the compost instead of merely rolling it around the bottom. Internal mixing fins are a common feature of DIY tumblers.
4. Build a simple stand
Make two sturdy A-shaped/sawhorse supports and connect them with crosspieces.
Drill holes near the tops of the supports for the axle. The barrel should sit high enough that you can easily rotate it and put a bucket underneath the door.
A simple wooden sawhorse-style frame is sufficient; you don't need a complicated structure.
5. Install the axle
Slide the metal rod through one support, through the barrel, and through the other support.
Make sure the barrel is reasonably centered and spins freely. You can add washers between the barrel and supports to reduce friction.
For easier turning, you can add a short cross-handle to one end of the axle.
How to use it
Add a mixture of:
“Browns” — dry leaves, shredded cardboard, paper, small twigs
Keep the contents damp like a wrung-out sponge, rather than soaking wet. Then rotate the tumbler every day or two to redistribute the material and introduce oxygen. Warm conditions generally speed decomposition.
Don't pack it completely full—the material needs room to tumble.
A useful improvement
If you live somewhere hot and relatively dry, such as South Texas, I'd use somewhat smaller/more numerous ventilation holes rather than huge holes, and check moisture frequently. A tumbler can dry out surprisingly quickly in hot weather.
Simplest version: If you want to minimize woodworking, you can make the barrel with an axle and simply roll it on the ground, although a raised wooden stand is much more convenient for loading and unloading.
If you'd like, I can also give you a cut list and exact dimensions for a $50-ish version, including a simple diagram of the frame.
Drill ventilation holes around the sides (roughly every several inches).
Cut a small door in the side if you want easier loading and unloading.
Attach hinges and a latch so the door stays closed while turning.
Air holes are important because compost microbes need oxygen to break down material efficiently.
2. Add the axle
Drill matching holes through opposite sides of the barrel.
Slide the metal rod or pipe through the barrel.
Add washers or spacers between the barrel and the frame so it can rotate freely.
3. Build a simple stand
A basic option:
Make two sturdy A-shaped wooden supports.
Mount the axle ends on the supports.
Ensure the barrel can spin without rubbing the frame.
Another design is a wooden cradle with wheels or rollers that let the barrel rotate in place.
4. Load your compost
Use a balance of:
Greens (nitrogen): fruit and vegetable scraps, coffee grounds, fresh grass clippings
Browns (carbon): dry leaves, shredded cardboard, straw, small twigs
A good starting mix is roughly 2–3 parts browns to 1 part greens. Keep it about as damp as a wrung-out sponge.
Using the tumbler
Add scraps and browns in layers.
Rotate it every few days.
If it smells bad, add more dry browns and turn it more.
If it is dry and not breaking down, add a little water.
Finished compost is usually dark, crumbly, and smells earthy rather than like food scraps.
A very simple “no-frame” version
If you want the easiest build:
Use a plastic trash can with a tight lid.
Drill many holes around the sides and bottom.
Add compost materials.
Roll the can around the yard every few days.
It is less elegant than an axle tumbler but works for small amounts of backyard waste.
A note: while tumblers are convenient, some composting experts prefer ground-based bins because they allow more natural organisms (like worms and other decomposers) to enter the pile. StopWaste If your main goal is maximum compost production rather than easy turning, a simple open-bottom bin may be worth considering.
Create the axis: Drill or use a hole saw to make a centered hole through the exact center of the bottom and the lid/top of the trash can.
Insert the rod: Run your PVC pipe or steel rebar straight through the center holes of the container so it pokes out evenly from both ends. Secure it inside with washers, duct tape, or end caps so the bin doesn't slide around on the pipe.
Build the frame: Construct a simple A-frame or rectangular wooden stand (or stack sturdy cinder blocks) tall enough that the suspended bin can rotate freely without hitting the ground.
Mount the tumbler: Rest the protruding ends of the pipe or rebar securely into notched wooden slots or cradles on your support frame.
Test rotation: Give it a spin to make sure it turns smoothly and your lid stays securely latched when upside down.
Getting Started with Your Tumbler
Add a balanced mix: Layer 2 parts "browns" (dry leaves, shredded cardboard, straw) to 1 part "greens" (kitchen scraps, coffee grounds, fresh grass clippings).
Spin it regularly: Give the tumbler a few rotations every couple of days to mix the contents and introduce oxygen.
Keep it moist: The mix should feel like a damp sponge. If it's too dry, splash a little water inside.
If you'd like, let me know:
What kind of container or materials you already have on hand
Whether you want a free-standing wooden frame or a simpler hanging/block setup
I can give you more specific measurements or troubleshooting tips.
Prepare the Drum:
Drill Air and Drainage Vents: Drill rows of 1/4-inch holes around the perimeter of the drum. Keep them small enough to let air in and excess moisture out, but small enough that compost won't spill out easily.
Install the Axle: Drill a centered hole straight through the exact top and bottom (or side-to-side depending on orientation) of the barrel. Run your steel pipe or rebar straight through the center. Secure it tightly using washers and nuts on both ends of the barrel interior/exterior so the drum spins with the axle or rotates smoothly around a fixed central pipe.
Build the Stand: Construct a stable wooden A-frame or H-frame stand using your 2 × 4 lumber. The stand needs to be tall enough that the barrel can rotate a full 360 degrees without hitting the ground.
Mount the Tumbler: Rest the ends of your axle onto the notches or drilled brackets on the top of your frame stand. Test the rotation to ensure it spins freely and stays balanced when loaded.
Community Tips & Experiences
I used an old 55-gallon plastic barrel and a metal rod. Drilling plenty of small holes for air is key, otherwise it turns into a stinky anaerobic mess.
Making sure the stand is level and stable on the ground before loading it with wet food scraps saved me from a total tip-over disaster later!
If you'd like, let me know:
Do you plan to use a plastic barrel or a trash can?
Do you have scrap wood available for the stand, or do you need a cut list?
I can give you more specific dimensions or troubleshooting tips for balancing the weight.
Clean the drum extremely thoroughly. Use only a food-grade drum that previously contained a non-toxic substance. Don't repurpose a barrel that held pesticides, solvents, petroleum products, or other hazardous chemicals.
Drill ventilation holes around the drum using a ½-inch bit. Space them roughly 8–12 inches apart, distributed around the sides. The holes provide oxygen while also allowing excess moisture to escape.
2. Install the axle
Mark the exact center of both circular ends of the drum.
Drill holes just large enough for your metal axle to pass through. Push the axle completely through the drum.
Ideally, reinforce the areas around the axle with large washers or plates so the plastic doesn't crack under the weight of the compost.
3. Make the access door
Cut a rectangular opening on the side of the drum—large enough to comfortably add and remove material.
Attach the cut-out section with two hinges and install a secure latch. Make sure the latch can't pop open when you rotate the barrel.
Tip: Smooth or cover the cut edges so you don't have sharp plastic edges.
4. Build the frame
Make a sturdy wooden frame that holds the axle approximately 18–24 inches above the ground.
The frame doesn't need to be pretty, but it does need to be sturdy. A full drum can become surprisingly heavy. The University of Arkansas plans, for example, use a substantial 2×4 frame and a steel rod through the drum.
Add diagonal bracing if the frame wobbles.
5. Add a turning handle
The easiest option is to extend the axle beyond one side of the frame and attach a short perpendicular handle.
You can then turn the barrel like this:
grab → rotate ½–1 turn → stop.
You don't need a complicated gear mechanism.
How to use it
Start with a mixture of browns and greens:
Browns: dry leaves, shredded cardboard/paper, untreated sawdust, small twigs
Greens: vegetable scraps, fruit scraps, coffee grounds, fresh grass clippings
A good practical starting point is roughly 2–3 parts browns to 1 part greens by volume. EPA guidance recommends at least two to three times as much brown material as green material.
Keep the contents about as damp as a wrung-out sponge. If it's soggy or smells rotten, add dry leaves/cardboard and turn it. If it's very dry, add a little water.
Turn the tumbler regularly—every day or several times a week when you're actively composting. Shredding/chopping larger pieces also speeds decomposition.
One important tumbler trick
Don't continually add fresh kitchen scraps to a batch you're trying to finish quickly. Fill a batch, balance it with browns, and let it compost. Keep a second container or pile for new material if necessary. Tumblers can become excessively wet and anaerobic when they're fed lots of food scraps without enough dry carbon material.
A well-managed tumbler can produce usable compost considerably faster than an untouched pile, particularly during warm weather, though actual timing varies substantially with the ingredients, temperature, moisture, and turning frequency.
If you want the absolute simplest version, you can skip the wooden stand: use a sturdy food-grade barrel with ventilation holes and roll it directly on the ground. But the raised axle-and-frame design is much easier to turn when the barrel is full.
