Answer: In theory, a good compost pile heats up well enough to decompose most nasty no-nos. But compost piles are beyond universal standard quality controls. So, using your own knowledge of your personal compost pile ... If the weeds have gone to seed (or insome cases are in flower, in which case they may still mature seeds), do not take the chance that the compost pile will decompose them. Also, if the weeds are vegetatively spreading types (such as Bermuda or quack grass, nutsedge, wild garlic), they may survive the compost process and return to haunt your new beds. Simple stems, roots, and leaves of other weeds are quite all right in the pile of rot.
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