I was thinking about getting the outdoor bamboo roll-up shades for protecting my patio container plants but I like your method better, Rodica. :)
This is my first winter with all of my container plants, I have 8 citrus trees (young) quite a few adeniums (Desert roses), and two "baseball" plants Jatropha Berlandieri). My seedlings will be brought inside to be under grow lights for the winter but I am hoping to let my bigger plants stay on the patio if they don't become distressed.