I have an established Clematis that has done very well over the years planted at the base of my house on the North East corner. It has been there about 10 years and over those ten years two trees in the neighbours yard have completely blocked out any sun to it. This year is the worse year for no blooms... only one!! I'm thinking transplanting it at this stage will kill it??? Maybe just leave it and enjoy the greenery of its leaves?? Or maybe I could cut half the trees down... like right down the middle since these darn neighbours let them grow on the fence line and they are now half on my property???

Seriously.... is it too iffy to move my Clematis now that it is so established?