Hmmm…. I think the first one that the water can drain from the top on all the way down is a good idea. Another idea I thought of was to take a fence panel and attach it to the house on the deck. Then make a pull up blind of sorts with plastic to lower when it needs to be covered and it will act as a temporary greenhouse.
I’m starting to like the idea of hanging them like the second on the right. It would involve plant hangers and potentially be more creative than permanently attaching them…. and if it didn’t work.. I could hang flowers on the hangers.