Cold Climate Cactus

The cold frame lids are wood with clear plastic taped on to them. It is hard to believe this thin plastic held on by tape will support the weight of snow and ice over the winter, but it does. A cold frame doesn't get any cheaper than this. Now there is no snow, but when the cold frames were opened in freezing conditions one of them cracked. It is as if the cold makes the flexible plastic fragile like glass. I just put some clear packing tape over the cracks and that should get the structure through the winter. Next summer I probably should replace the plastic with some new plastic.