Feed your plants a cup of Joe

Coffee grounds are rich in nitrogen, which helps feed the bacteria in the soil that turns organic matter into compost, according to researchers at Oregon State. Coffee grounds also have the ability to reduce gas emissions and can kill weeds naturally, making your garden healthier in the long run. Note: This isn’t a quick fix—the grounds act slowly. Coffee grounds are kind of like a natural fertilizer and have a similar ratio of carbon to nitrogen (20:1) as manure.