How long does it take to get aged cut grass clipping that I could mulch w/ on the garden?
Is it a full year? Would the grass clippings age quicker, in a closed black plastic bag or just out in the environment? Thank you
Baltimore County Maryland
Warmth and moisture will make them decompose more quickly. Once they decompose they will be more of a soil amendment than a mulch. The plastic bag would speed up the process in cooler weather especially. If you want to use them as a mulch to suppress weeds, you can use them immediately. They will use a little nitrogen as they decompose, so you can sprinkle a little nitrogen fertilizer on them.
A thick mulch of fresh purely grass clippings (no brown--i.e. carbon-- materials, such as dead leaves), may have an unpleasant odor as they decompose. To prevent that, mix in a little brown material (straw, dead leaves).
See our publications on mulch and compost in the Publications section on our website.