Greenhouse Season Extender
These double cold frames are a great way to extend your season. Whether covering crops in the late fall, early winter or spring, it will give the needed protection to grow your crops a little longer or start your crops a little earlier. The pictures below are from my personal garden. I use these in the late winter to grow lettuce, cabbage, cilantro, radishes, beets, carrots, broccoli, cauliflower, spinach etc. If you need some extra heat you can place a heavy blanket, hay, a burlap bag of leaves, etc over the top of the closed frames. The covering is a thin single layer polycarbonate which you can see clear through. The frame is aluminum and rigid polypropylene. It has a 5 year warranty. You can leave either side open or closed independently of each other.