Starbuck has a green program called “Grounds For Your Garden”, which has been done since 1995. They give some bags of coffee grounds for free to every customers who need. These coffee grounds can be used for growing media and fertilizer.
The coffee grounds can also increase the Nitrogen supply, Phosphor, and Potassium which is needed by plants to fertilize them. You can spread this coffee grounds in your plants or garden. Besides, the coffee grounds also contains of Magnesium, Sulfur and Calcium for plants.
For our home application, we can also use our coffee grounds in similar method like Starbuck does.