Many people don't have the room for or don't want to/can't spend the money for a permanent greenhouse. Building a temporary one outside can be challenging because high winds can literally blow it away. Here is a solution to that dilemma.
Name: Kurt Nehrbass Buffalo, NY (Zone 5b) A weed is only a misplaced wildflow
I thought about doing something like this actually in my basement where I could water without worrying about what was going to get wet. I'm glad you wrote this. :)