@cleopatria I have opened the GH hoop and found no sign of scale on my plant. I bought Neem Oil, but didn't use it. I spread coffee grounds in the large pot. Not sure if it was the grounds or the really cold spell of weather we've had. We're about to have the "last freeze" of the season this evening. I'm not so sure, so I'm not uncovering anything for a couple more weeks.
I grow all the things you have listed, except for Impatiens. After two seasons of losing them all, I have given up. Whatever caused them to die off is still in the soil. I'm not going to try them again until someone figures out how to make them bullet proof! (Oh, and no Desert Roses. I over water them!).