Check out your local Starbucks for free starbucks coffee grounds. There is one store that is located near where I live. If I call in the morning they will save coffee grounds for my to pick up. And then I use them in my garden or in my compost! Even though coffee is acidic, the acid goes into the coffee leaving the coffee grounds almost neutral.
One difference with my last batch of compost is that we discovered free Starbucks Coffee grounds. Some stores package them and leave them out in silver bags in a wicker basket, free for the taking. Even though the grounds are brown colored they are considered greens and not browns because they are high in nitrogen. They have to be mixed with browns or carbon to compost properly. The shredded leaves worked great for this process.
Getting StarBucks Coffee Grounds on the NJ Turnpike
We had a very good experience with a Starbucks store on the NJ Turnpike. We asked for used grounds because their basket holding the silver bags was empty. There was a long line waiting for coffee so they said no they are too busy. Then this young guy reconsidered and said, “Sure, I’ll get some for you!” He emptied the whole trash can into a plastic bag which was very heavy. And then he decided he needed a break so he carried it to our car. What great service and what a lot of coffee grounds! You don’t get nearly that much in a silver bag. I think all the used Starbucks coffee grounds greatly enhanced and sped up our composting process. Thanks to Starbucks–a company contributing to our environment by recycling all those coffee grounds and keeping them out of the landfills.