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Hot Composting

Official
G Grow Food Together ยท Published June 15, 2026

Make finished compost fast with a balanced, well-aerated pile that heats up as it breaks down.

Section 1: What it is

Hot composting builds a pile big enough and balanced enough to heat to 130โ€“160ยฐF as microbes work. At that temperature it breaks down in weeks rather than months and kills most weed seeds and pathogens.

Section 2: Why it helps

It's the fastest way to turn yard and kitchen waste into rich compost, and the heat produces a cleaner, weed-seed-free product. A finished pile feeds your beds and closes the loop on garden and kitchen waste.

Section 3: How to set it up

Aim for a pile at least 3x3x3 feet so it can hold heat. Mix roughly 2โ€“3 parts "browns" (dry leaves, straw, cardboard) to 1 part "greens" (food scraps, fresh grass, prunings). Chop materials small and dampen each layer like a wrung-out sponge. Turn the pile every 1โ€“2 weeks to add air. When it stops heating and looks dark and crumbly, it's ready.

Section 4: Tips

If it smells bad or stays cold, it's usually too wet/too many greens (add browns and turn) or too dry (add water). Keep meat, dairy, and oils out. A pile that's too small won't heat โ€” bulk is what holds the warmth.

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