Luckycloud, I don't know about your yard, but where I live, mountain top, I get such high winds in winter, I have to use 4x4 wooden frames wrapped in plastic (4mil) and either sink the posts into ground or stake them down with rebar; last winter My new frame didn't last a day, being blown off the ridge in front of my house before I had a chance to stake it down at the end of October. That little greenhouse from Amazon would be flattened by snow/ice if I could stake it down. NC is a different growing experience I think from our comrades in SC and GA.