After reading about “wall-o-waters” in a book about gardening in the Great Plains, we eventually noticed a similar product for sale in Ellison’s Feed & Seed called Season Starters and decided to give them a try. We got 3 in one pack for about $15. They’re like mini greenhouses using water for both insulation and stability in a series of cells. We clamped ours shut with the stainless steel clips we like for holding plastic on the hoops for the greens. We put them around some new plants we ordered from California (I’Itoi bunching onions, Florida Finley bunching onions, and society garlic which is not actually a garlic though in same family). They should be fine in our winter once they’re established, but they just arrived a week or two ago.