Good morning everyone. I have saved coffee grounds that I put into my garden all the time. The first thing to remember is that you need to save them in a open container. If you save them in a closed container you will trap the moisture within the coffee grounds and mold will grow. A big mistake I made this year.
I have never used coffee grounds within a layout before so I may try it sometime. For now they will still go into the garden. I plan on giving it a try this time.