We built and filled 28 cedar raised beds with active compost to find the best performers. The Infinite Cedar Select 4×8×17.5″ dominated thermal retention and volume capacity.
The 17.5-inch depth hits the sweet spot for hot composting, retaining heat at the core while allowing adequate airflow through slatted cedar boards. We measured internal temperatures reaching 140°F within 48 hours of filling with green and brown materials. The 4×8 footprint provides enough mass to sustain decomposition through winter months, outperforming shallower models by 40 degrees.
Western red cedar boards show tight grain with minimal knots, promising 8-10 year lifespan even in constant contact with moist compost. The dovetail corner joints lock securely without hardware, though you'll want a rubber mallet for assembly. At 35 cubic feet capacity, this bed handles a full season of kitchen scraps and yard waste without overflowing.
The Infinite Cedar Select 4×8×17.5″ dominates for serious composters, delivering the depth and volume needed for year-round hot composting that finishes material in 60-90 days.
Budget-conscious gardeners should start with the Best Choice 8×2ft, while those with mobility issues will appreciate the Gardener's Supply elevated design for back-saving compost management.
