Just thinking about how these trees get rated for full or part sun. I consider myself to be pretty in the middle of the country where if something is zone 6 and full sun hardy it should count me in. Not like I am at some elevation in Arizona or someplace with a zone 6 winter but a hot arid summer. Please say they aren't tested in a cloudy London climate. It was my purple ghost that has me thinking btw. It is not dead but gets pretty crispy by August now that I treat it as an established tree. I swear it says sun or shade on the Bucholz website.