We put coffee grounds into the compost bin and it gets used on everything. I know roses and azaleas and gardenias enjoy having the grounds scratched into the surface of the soil...as do most acid loving plants.
I agree, use them anywhere that you want to add organic material to your soil. Most of the acidity in the coffee grounds comes out during the brewing process, so adding coffee grounds to your soil won't make a substantial difference in your soil pH.
Can you elaborate on what is meant by coffee being a "soil conditioner"?
I found two Biggby Coffee franchises that have agreed to save their grounds (and filters) for me. I gave each of them two 25-quart covered containers today. One of the Biggby's is a 24-hour cafe, and this weekend is East Lansing's annual art festival. I can't wait!
Does anyone know if there are any plants/bushes/vegetables to which the grounds would be detrimental?
I wish that more coffee shops would give away their grounds. This would keep the grounds out of the landfills and provide us gardeners with a terrific soil amendment. The Dunkin Doughnuts in my area won't save grounds.