I would say that I probably brew about 3 to 4 pots of coffee every day. So I go through a lot of coffee grounds. One day I was looking at the trash can at all of the piles of coffee grounds in there and I thought to myself, what a waste. I am just running some hot water through it to make coffee and then tossing it; and a lot of it at that. I wanted to see if I could use all of these coffee grounds for something else, so I was looking for ideas online on what I could do. I found a site with some amazing things you can do with coffee grounds. You can use coffee grounds in your plants to make the flowers color more vibrant like the hydrangeas will be bluer. Coffee grounds can also keep slugs away. Coffee grounds can also increase your carrot and radish harvest.