Here is a link that might be useful: Acid loving plants
| See the bottom of this page for a discussion of the pH of coffee (it doesn't go into the pH of the grounds themselves). |
Here is a link that might be useful: pH of coffee
| I agree with rhizo, a whole lot of coffee grounds are not going to change the pH but possibly a little bit and you can neutralize this with a tablespoon of lime. I sprinkle it around ALL my plants and even add it to my compost pile and potting soil mixes. I think this is a good thing Starbucks is doing so I wrote about it on my blog. |
Here is a link that might be useful: click on BLOG