With wind speeds up to 23 mph we found it difficult to put the greenhouses together and spent more time than we had hoped getting them completed. When we were finally finished we had to use a big pipe to hold them all down to keep them from flying away. As it was when we came back on Monday morning to plant the rice the greenhouses had moved about 30 feet despite the heavy pipe.
If you have a choice don't put greenhouses together in the wind.
Also, you will uses a lot of duck tape, so add a couple of extra rolls for the six greenhouses.