"Greens" are the nitrogen-rich additions to your compost pile. These tend to have lots of moisture, break down quickly, and provide a quick burst of heat to your pile. While we call them "greens," technically any plant matter will work here: coffee grounds, for example, are brown in color, but they're rich in nitrogen, hence, they're a "green." Here are some ideas of greens for your pile: 1.Fruit and vegetable peels 2.Citrus rinds 3.Melon rinds 4.Coffee grounds 5.Tea leaves/tea bags 6.Old vegetables from the crisper 7.Houseplant trimmings 8.Weeds that haven't gone to seed 9.Grass clippings 13.Seaweed