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Composting problems and solutions

Sustainable living    Composting guide    Composting problems and solutions

As simple as it may be to set up a composting system, there are problems that even seasoned professionals encounter - here are a short list of issues along with recommendations for success.

Problem: The compost pile does not heat up or appear to be decomposing

There are several things that can stall or slow down the composting process. Take a look at your compost pile and see if any of these issues are present:

  • If the compost is too wet, turn the pile and add dry, coarse material such as straw or wood chips.
  • If the compost is too dry, add enough water to moisten the pile without soaking it.
  • If the compost pile is moist, but isn't decomposing, your compost contains too much “brown” and not enough “green” material. Turn the pile and add nitrogen-rich material such as manure or grass clippings.
  • If the compost is damp and warm in the middle but nowhere else? The pile is probably too small. Add more material and mix into a new pile and add just enough water. It’s also possible that your compost may be finished; if it’s dark and crumbly with an earthy smell, it’s done and ready to use in your garden.

Problem: Pests are living in or near your compost pile

Undesirable animals such as rats, raccoons and insects may be attracted to meat or fatty food scraps or too much fruit and vegetable material. Remove fatty food or excess kitchen scraps from pile, turn it to increase temperature and balance carbon to nitrogen ratio, and use animal-proof compost bin.

Problem: Compost smells rotten

Your compost is too wet and is not getting enough air – it is rotting and not decomposing. Turn compost to aerate it and add dry, absorbent material.

Need assistance?

Metro Recycling Information
503-234-3000
mri@oregonmetro.gov

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Metro
600 NE Grand Ave.
Portland, OR 97232-2736
503-797-1700
503-797-1804 TDD
503-797-1797 fax