Compost Bin: Pallet Pen, Tumbler, or Worm — Which Bin for Your Yard
Pallet pen for cheap volume, tumbler for fast finished compost in small yards, worm bin for indoor or small-output composting. Three categories, three tradeoffs.
Three bin types matter. Pallet pen (3 wood pallets wired into a U): free or near-free, holds 1+ cubic yard, slow-finish in 6-9 months. Tumbler: $80-200, dual-chamber preferred, fast-finish in 6-10 weeks with frequent turning, limited to ~3 cu ft capacity. Worm bin (vermicompost): indoor or balcony, $30-60 to build, produces concentrated castings rather than bulk compost. Pick by yard size + how much input you generate.
Pallet pen (cheap + volume)
The right choice for any yard that produces meaningful yard waste — fallen leaves, grass clippings, garden trimmings. Three or four wood pallets (often free from hardware stores or lumber yards) wired or hinged together form a 4-foot cube. One side stays open or has a removable front for turning and harvest. Cost: $0-25 in zip ties or hardware. Capacity: 1+ cubic yard per pen. Finish time: 6-9 months slow, 2-3 months if turned weekly. Drawback: not visually tidy; better in a back corner.
Tumbler (fast + tidy)
A barrel mounted on a frame, turned via crank or handles. Dual-chamber models let one side finish while the other accumulates fresh material. Cost: $80-200. Capacity: 3-7 cubic feet per chamber. Finish time: 6-10 weeks with frequent turning.
The right choice for: small yards, kitchen-scrap composting (sealed bin keeps rodents out), gardeners who want predictable fast output, urban or HOA settings where a pallet pen wouldn't fly. Drawback: limited volume — a 7 cu ft tumbler doesn't keep up with a serious garden's input.
Worm bin / vermicomposting (indoor + concentrated)
A stack of plastic bins (homemade or commercial like Worm Factory) seeded with red wiggler worms (Eisenia fetida — NOT regular earthworms, which won't survive in a bin). Worms eat kitchen scraps and produce dark concentrated castings used as fertilizer rather than bulk amendment. Cost: $30-60 DIY, $80-150 commercial. Capacity: about 1 lb of scraps per pound of worms per week. Finish time: 2-3 months from full bin to harvestable castings. Right for: apartments, balcony gardens, kitchen-only compost producers.
What goes in (any bin)
Greens (nitrogen): kitchen vegetable scraps, coffee grounds, fresh grass clippings, garden trimmings. Browns (carbon): dry leaves, straw, shredded cardboard/newspaper, wood chips. Aim for 3 parts browns to 1 part greens by volume.
Skip in any home bin: meat, dairy, oily food (rodents, smell), pet waste (pathogens), diseased plants, herbicide-treated grass clippings. Worm bins additionally skip: citrus, onions, garlic, spicy peppers — worms avoid these.
Quick decision tree
Large yard + back area you don't mind looking utility: pallet pen, possibly two side-by-side. Small yard + want tidy: dual-chamber tumbler. Apartment or balcony + kitchen scraps only: worm bin. Any combination if you have the space and time.