Yes, these Turnip Greens will freeze well, maintaining their quality for up to 10 months. First, let the Turnip Greens cool down to room temperature. To discourage bacteria from forming, cool them down as quickly as possible by placing the bowl inside a large bowl or sink full of cold water and some ice. Once cooled down, place the Turnip Greens in an appropriate air-tight freezer container or vacuum-sealed bag, allowing some headroom for expansion when the water inside them freezes. Place the container in a zero-degrees Fahrenheit freezer for up to 10 months.