North American Fruit Explorers mailing list at ibiblio

[Mathew Waehner <waehner@gmail.com>]

I've read that coffee grounds are 2% nitrogen. 

 

I think the main concern with tilling in mulch type materials is that they will "steal" nitrogen as they get colonised by bacteria and fungus, which need nitrogen.  Since coffee grounds are loaded with nitrogen, I don't think that will be a problem.

 

As far as caffeine, I've seen red wriggler worms, soldier fly larvae, and pill bugs eat coffee grounds and live.  I used to worry about it, but now I don't.  I've read some articles about a slug killer under development using caffeine, but it was about twice as strong as fresh grounds.

 

 

On Fri, Feb 20, 2009 at 9:14 AM, <Jerrydana5@aol.com> wrote:

So, if you use coffee grounds to add organic matter, does the caffeine still present  a problem?  If so, what?  Can you just till them in, or must they be composted first?  jerry in southern Indiana

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