Coffee grounds can be an excellent addition to a compost pile. The grounds are relatively rich in nitrogen, providing bacteria the energy they need to turn organic matter into compost.

Contrary to popular belief, coffee grounds are not acidic

Here are some suggestions for using composted grounds

Mix grounds into soil as an amendment.

Add grounds to your compost pile,

coffee grounds help to sustain high temperatures in compost piles. High temperatures reduce potentially dangerous pathogens and kill seeds from weeds and vegetables that were added to the piles. They have noticed that coffee grounds seem to improve soil structure, plus attract earthworms.