Most of the acidity in coffee is removed during brewing. Spent coffee grounds are only very slightly acidic (depending on the water used to brew) to neutral. Grounds contain more nitrogen than phosphorous or potassium, as well as some minerals. For composting, the grounds would actually be considered a "green" material due to the nitrogen content.
It is popular in composting and vermiculture and seems to be a preferred food of earthworms. You can add spent coffee grounds to compost along with other green materials such as grass clippings, kitchen wastes, and brown materials like autumn leaves, shredded newspaper, sphanum-peat, wood chips\shavings and small twigs, etc.
just wondering if it is a good fertilizer or not. ive grown outdoors in ohio for 5 years each year ive got roughly a quarter pound off each plant. never bought seeds but i use seeds from dank buds not schwag. i normally use fox farms big bloom and tiger bloom but i wanna go full organic. the coffee doent seem to hurt the plants but i dontwant to ruin my babies. also im in florida now , would tht have any effect what i use? thank you
They can also be quite toxic. Why don't you Google caffeine plant growth experiments, they've been done.
