I've been researching the weeping kousa dogwood and have found some conflicting info on the size (which is very important to me because I have limited space where I was thinking of putting it). The "Landscape Plants" book says 4-5' x 4-5', but while surfing the web, I've seen 6-8' x 6-8' and bigger. Anyone have an idea of how big it really gets? I'm in zone 6 (on the border of zone 7). Also, the site has northern exposure (AM sun, PM shade). Will the kousa dogwood do well here? I've seen that it does OK in sun or "light shade."

Thanks!