At my friend’s house I noticed a fine dark granulated material in all of his potted plants. He said that he dumps coffee grounds straight into the pots, and sure enough all of his plants look just great. I would imagine that would make for an awfully acidic soil. I’ve got quite a few droopy plants that could stand to be perked (heh) up. Maybe a shot of joe is what they need?
What is it about coffee grounds that plants like?
IANA horticulturalist but a Google search shows some commercial products using coffee grounds and from this tips page:
Also from the above site, caffiene is considered to work as a herbicide.
Coffee grounds aren’t acidic, although you’ll find many sites that say they are. From a FAQ at GardenWeb.com
They love coffee grounds over at GardenWeb. In addition to the above link, try Coffee Grounds and Coffee grounds as a straight fertilizer??
My grandmother used to “water” her house plants with leftover, cold coffee. She had the most gorgeous plants I’ve ever seen.