Cold frames are a terrific way to extend the growing season on both ends; serving as mini-greenhouses they allow your garden to keep producing in cold weather months when growing would otherwise be impossible. These beautiful, locally made cedar cold frames measure 24″x 44″ and slope from 5″ in front to 24″ in back (custom built sizes are also available). A temperature sensitive piston automatically opens and closes the lid as-need to create a perfect climate for your plants.