Making a compost bin from pallets: the zero-waste trick for your garden
Making your own compost bin from reclaimed pallets is a quick, economical and ecological project: you recycle pallets, reduce your waste and get a free natural fertilizer for your garden. Allow half a day of work, a bit of equipment and a few simple gestures to produce well-matured compost in 6 to 12 months.
The materials and tools needed
- 4 standard pallets (120 x 80 cm) in good condition, preferably marked EPAL or without questionable markings
- Galvanized metal brackets and 5 x 60 mm wood screws
- Jigsaw or circular saw to cut the pallets
- Crowbar, hammer, nails to dismantle damaged pallets
- Drill/driver, tape measure, spirit level
- A front flap in wood (movable slats) or boards to hold the compost in
Choosing and preparing the pallets
Prefer pallets in good condition, not treated with chemicals: pallets marked HT (heat treated) are ideal. Remove protruding nails and staples with a crowbar and sand the rough areas. If a pallet is too damaged, keep its boards to make the front flap or reinforce the corners.
Assembling the compost bin
- Choose a semi-shaded spot, on flat, well-drained ground
- Fix two pallets upright to form the back and one side, screwing them at the corners
- Add the third pallet to form the second side
- Assemble the fourth pallet at the front, keeping it removable or cut
- Reinforce the corners with metal brackets and check the stability
- Cut 2 or 3 slats at the bottom of the front pallet to form an easy-to-open flap
The right location and aeration
- Place the compost bin directly on the soil, never on an impermeable slab
- Provide easy access with a shovel and rake to turn the compost
- Avoid full sun that dries out and a too-shady, damp back of the garden
- The bottom must be in contact with the soil to let earthworms in
Filling and maintaining the compost
- Alternate brown materials (dead leaves, cardboard, wood chips) and green materials (peelings, clippings)
- Add your waste in 5 to 10 cm layers, mixing lightly
- Water lightly if the compost is dry, keeping it as moist as a wrung-out sponge
- Turn the compost every 2 to 4 weeks with a fork to aerate it
- Collect the mature compost after 6 to 12 months, at the bottom and sides of the bin
What can go in the compost?
- Peelings and fruit and vegetable scraps, crushed eggshells
- Coffee grounds, tea bags, paper filters
- Dead leaves, grass clippings (in thin layers), shredded branches
- Unprinted cardboard, shredded newspapers, wood shavings
- To avoid: meat, fish, dairy products, excess citrus, diseased plants
Composting time and the right moment
Balanced compost, regularly turned, matures in 6 to 12 months. The process speeds up in summer, when the internal temperature of the pile climbs to 50-60 °C, and slows in winter. The compost is ready when it has a dark, crumbly texture and a forest-floor smell: it no longer looks like the original waste. Sieve it if needed to remove pieces that are too big, which will go back into the bin. Spread it on the vegetable garden in autumn or spring, in a 2 to 3 cm layer, then scratch it lightly into the soil.
The mistakes to avoid
- Using treated or painted pallets: the chemicals contaminate the compost
- Placing the compost bin on a slab or concrete: no aeration and no earthworms
- Never turning the compost: it compacts, ferments and smells bad
- Putting in meat, fish or dairy products: they attract pests
In half a day, you build a solid, free compost bin that recycles your kitchen and garden waste for years. The resulting compost, rich and dark, enriches your vegetable garden and flower beds naturally. A simple, useful and rewarding project for all gardeners concerned about their ecological footprint. To go further, build a second pallet bin: you can transfer the maturing compost into it while the first keeps receiving your waste, an ideal method for faster, better-structured compost. As a complement, a third compartment for storing dead leaves and shredded material guarantees you always have brown matter on hand to balance your inputs.