add a little acid?

they will change the pH and lowere it (make more acid) and add organic matter....we use coffee grounds here in Coloraod because the soil is about 7.5-8 pH.....but up there it might not do you service...unless you compost them first....

~SP

Acid loving plants such as rhododendrons love organic coffee grinds.

i would add it to the compost first.

I would throw that shit right down on top of the soil. I try not to worry too much about these things. i mean say you want to plant the peas where the potatoes were last year. Do you adjust the soil, and then un-adjust it for the next crop every time? I don't do that too much except for a sprinkle of this or that on top of the soil and things seem to work pretty well. If you are worried about acidity, just sprinkle some wood ashes on there with them, or a little oyster shell or limestone, I'm sure you'll more than cancel out any ill acidifying effect. I would be more concerned with the nitrogen content. They are high in nitrogen, which is often a good thing, but not always. I use in moderation on an as needed basis. I read somewhere that equal amounts of wood ash, bone meal and coffee grounds makes a pretty balanced fertilizer, but haven't looked into whether that is true or not. Anyway, if one were to mix equal amounts of wood ash and coffee grounds together, I can't imagine the wood ashes wouldn't win that PH contest.