Used coffee grounds in the garden - Ask Extension
Is it a good idea to add used grounds to soil? And under what situations is it beneficial? Is there a trusted resource for learning about safe ways ...
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Used coffee grounds in the garden #789399
Asked May 05, 2022, 11:46 AM EDT
Is it a good idea to add used grounds to soil? And under what situations is it beneficial? Is there a trusted resource for learning about safe ways to use it? The Internet advice is all over the range of good vs bad.
Thanks for your help!
Gail Kupferschmidt
Brimson, Mn
St. Louis County Minnesota
Expert Response
Coffee grounds are a great source of organic material for the compost pile. Caffeine in the grounds may deter slugs from your hosta. Spread the grounds about an inch deep around individual plants. Research has demonstrated that coffee grounds have an inhibitory effect on seed germination when used as topdressing.
The Oregon state University site has information on coffee ground site
https://extension.oregonstate.edu/gardening/soil-compost/coffee-grounds-composti
https://blog-yard-garden-news.extension.umn.edu/2019/05/myth-or-miracle-coffee-grounds.html
