Wow, talk about resurrecting an old thread!Â
Â
Unless the grounds have taken a trip through the south end of a northbound worm, don't count on them providing that big nitrogen boost immediately. Â
I used ~20% fresh grounds in this year's potting mix and was worried that this might over-fert the plants and burn them. Nope! The plants, once transplanted, actually faded and started to go pale on me! A belated dose of tomato food has darkened the leaves and improved plant appearance significantly.
Â
Perhaps, with time, the bugs in the soil will decompose the coffee. Until then it's apparently just sort of sitting there, providing soil bulk and a bit of water retention, but not much more.Â
Â
Bring a bucket to Starbucks just as they are closing. The workers welcome this, presumably because they can just dump their machines without having to fiddle with bags and whatnot. When doing this, it's easy to come away with several gallons of the stuff per night.