I have about one acre in lawn and whilst I mulch as much as I can there are times I do have to cut and collect. I dump the cut grass in two dirty corners in the garden but now they are just unusable as they contain a dreadful gunge. I cannot drive the mower in. Is there anything I can do to break down or dry up this ugly mess?
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All you can do otherwise is to choose another place to dump because large quantities of wet cut grass tends to clump togehter and exclude air. This leads to anaerobic digestion and wet, slimy smelly decay.