coffee grounds and moss

Asked January 31, 2019, 2:54 PM EST

Does the application of coffee grounds to a lawn encourage the growth of moss/lichens?

Coos County Oregon moss in lawn

6 Responses

Taking this description answer right from our OSU website, the answer would be a 'yes': Coffee grounds encourage the growth of microorganisms in the soil, which use nitrogen for their growth and reproduction. While the grounds are being broken down by the microorganisms the additional nitrogen in the fertilizer will provide a source of nutrients for your plants. As they would add nitrogen to help your lawn grow, they might do the same for moss--especially if that grass is in the shade.

Thank you very much for your research and answer. Would you suggest additional dolomite lime be spread?

Charles Couture

Thank you very much for your research and answer. Would you suggest additional dolomite lime be spread?

Charles Couture

Hello again, and yes, that would probably help your situation with moss. That being said, you may want to check your soils first to see what the magnesium content is as many soils tend to be high with that element on the south coast (especially here in Curry). Page 5 in this publication discusses how to amend for magnesium--and that in SW Oregon too much may be a factor: https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/ec1478.pdf and if this is the case, you wouldn't want to use dolomite but ag lime instead. Here's the publication that will help you find out where you could test your soil: https://catalog.extension.oregonstate.edu/em8677 .


Thank you.

Charles Couture

You are most welcome and hope your lawn grows well.