Coffee Grounds For Indoor Plants. White clover Palmer amaranth and perennial rye were the three plants used in their study. Both brewed coffee and tea are slightly acidic and over time may change the soil chemistry in your pots too much.
Coffee grounds contain nitrogen which helps eliminate a foul-smelling sulfur gas from the air when its combined with carbon 11. You can even water your plants using coffee. Just make sure to limit your coffee quantities as too much caffeine can stunt plant growth and increase the risk of fungal diseases.
Mix 1 part of coffee ground to 3 parts of garden soil or potting mix for best results.
Used coffee grounds are the leftover remnants from making your brew. You might enjoy cream sugar and other additives but your plants wont. Composting grounds introduces microorganisms that break down and release the nitrogen as it raises the temperature of the pile and aids in killing weed seeds and pathogens. Coffee grounds contain nitrogen which helps eliminate a foul-smelling sulfur gas from the air when its combined with carbon 11.