I'm thinking about some xenia. My thoughts were to put it on the back glass and let a big patch grow up the glass. I think it would look neat. Any thoughts?
That should work fine, they well be easy to scrape off then when you have to prune them out. You well have to probably use wedding vail and super glue the vail in 4 or 5 spots until they attach, whic doesn't take but a few days most of the time.