I’ve recently tried mixing the used coffee grounds in baking soda, and I’m seeing a very visible chemical reaction. I haven’t tried putting it in the ground yet though.

  • verity_kindle
    3·
    6 months ago

    I’ve mixed hundreds of pounds of used, fermented grounds into my 1100 sq ft. of loamy clay soil over the last three years. Some plants love it, a few don’t. I had the soil tested at the beginning and end of the three years and it didn’t change the pH significantly. The grounds start to sour, ferment and grow fungi as soon as a day after being stored, so get it out in the garden as soon as possible.

    • Mambabasa@slrpnk.netOPEnglish
      41·
      6 months ago

      Oh that’s interesting. I noticed the mold as well when I leave it out. Could I grow mushrooms on it?

      • verity_kindle
        3·
        6 months ago

        I don’t know enough about myco propagation to answer. I know they need rich organic matter. I always mix my grounds with composted cattle manure, food scraps and straw.