Full of Compost: When “100% Compostable” Isn’t

A word to the wise for adventurous composters: Food containers made from PLA, also known as corn plastic, will not degrade in a home compost heap. Even those labeled “100% compostable” usually require specialized conditions to even begin breaking down — correct amounts of added nitrogen, for example, and temperatures that well exceed 100 degrees for days on end.
Where can you subject your take-out container to such conditions? Only at a commercial compost facility, if it even accepts residential waste. Alternatively, some grocery stores and chains will collect PLA containers and bring them to a commercial facility for you.

But in your backyard, they’re not going to do anything but take up space.

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