How to Build a Composter: DIY Bin Plans for Every Garden

Compost—created by earthworms and microbes from leaves, kitchen scraps, and plant debris—is the ultimate free soil amendment. Building the right composter in the right spot with the right ingredients makes it effortless.

Choosing a Location

Not visually obtrusive, not upwind. Convenient for winter kitchen trips. Near where compost will be used (vegetable garden, potting bench). If daily turning needed, place where visible.

Determining Volume

Ideal bin: 3 ft high, wide, and deep. Track monthly waste volume (kitchen veg scraps + yard waste) using a large trash can. Plan for two months' capacity per bin. Three bins allow continuous rotation: fill one, turn to second, third ready to fill.

Wire-Framed Bin

Four 6-ft 2x4s set in 2-ft deep holes, 36-inch square. Concrete or pack soil. Attach chicken wire on three sides. Fourth side is a gate with hinges and a dowel latch. Add a perforated PVC pipe in center for aeration.

Slatted Bin

Similar posts. Use rot-resistant 2x6s (cedar/redwood) with ½-inch gaps for airflow. Front has a channel for removable 2x6 slats. Optional plywood floor eases compost removal.

Tiered Bin

Multiple slatted bins sharing walls. Turn compost by moving from one bin to the next. Deluxe version includes three bins and roof panels to regulate moisture.