Hi MrsC. I use a 3 tier mini greenhouse. The first bit of wind we had it just blew away. I now tie it to the wall so it can't go anywhere. The main problem is the plastic covers rip. The main weakness seems to be where the plastic is sewn to the zip so make sure you can get replacements if you want to use this type. Some makes you can also get fleece covers and net covers. I think they would be more useful INSIDE an existing greenhouse for extra insulation for tender plants or to increase humidity in part of the greenhouse space.