a 'compost heap' = ('chiefly US') a 'compost pile' [=a pile of plant materials that are kept in a garden and allowed to decay to create compost]
We 'compost' leaves in our backyard.
(..) Then throw away the worser part of it and live the purer with the other half Repent what's past, avoid what is to come And do not spread the compost on the weeds to make them ranker Pray, go not to my uncle's bed. Assume a virtue if you have it not Refrain tonight, and that shall lend (..)2015 Hamlet