John Polk wrote:Those N-P-K numbers are a percentage.
Therefore, a 100 pound bag of coffee grounds would have:
2.0 # N
0.67 # K
Coffee grounds are not considered a good fertilizer.
Dale Hodgins wrote:
This website gives a run down on various manures. Consider dairy cow manure vs coffee --- http://www.plantea.com/manure.htm
N .25 --- Coffee has 8 times as much
P .15 --- Coffee has twice as much
K .25 --- Coffee has 2.5 times as much --- I rounded the figures
Coffee has almost twice as much nitrogen as chicken manure, yet it can be spread without risk of burning. I think the woody nature causes nutrients to release slowly. Are these manures also not considered good fertilizers?
The coffee acts more slowly. When I scoop up a hand full of my coffee mulch, there are always sow bugs, worms and other critters in it. It always disappears, so I asume that they eat it. These creatures poop and they eventually die. When this happens, nutrients become available to plants.
Willy Walker wrote:Adding that much coffee you would be the one to ask, Do coffee grounds change the PH?
I would find it hard to purchase grounds as they are free so many places. I would think the best market would be that of indoor growing. it would have to be sterile. At one point i was purchasing "organic worm castings" it was expensive. Now I make my own. Actually a good portion of the input is coffee grounds. Reading more into though, it sounds like coffee has its place in the outdoor garden..