Compost

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Compost

Turn scraps, manure, leaves and garden waste into black gold: log each pile, what goes in, when you turn it and how hot it gets, and spread the finished compost on your beds.

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How-to guide · Compost

Making Compost

Compost turns manure, bedding, leaves and kitchen scraps into the best garden food there is. A hot pile is fast; a cold pile is easy. Both work.

Mix
about 2–3 parts browns to 1 part greens
Smallest hot pile
3 × 3 × 3 ft
Hot pile
130–160°F
Ready in
2–6 months hot, 6–12 months cold

1What goes in

  • Greens (nitrogen): manure, grass clippings, kitchen scraps, garden waste.
  • Browns (carbon): leaves, straw, wood chips, used animal bedding, cardboard.
  • Leave out meat, dairy, grease, dog and cat waste, and diseased plants.

2Building a hot pile

  • Build it all at once, at least 3 ft each way, layering greens and browns.
  • Keep it as damp as a wrung-out sponge.
  • Check the temperature; when it drops below about 110°F, turn the pile.
  • Turn 3–5 times; when it doesn’t heat up again and looks like dark soil, let it cure a month.

3Using it

  • Spread 1–3 in on beds each year, or use it as mulch.
  • Fresh manure should be composted or aged before going on food crops (rabbit manure is the exception).
  • Screen finished compost for seed-starting mixes.

Put it to work

These free tools keep the records for you once you’ve made an account:

These are rules of thumb from university extension guidance. Breed, climate and your state’s rules change the details — your county extension office is the best place to ask, and you can find it on the selling rules page by ZIP code. All how-to guides →