I'm only zone 5a, but since we lost an ash tree, I have 'Curly Fries', 'Roller Coaster Ride', 'Little Treasure' growing in full sun and thriving. A border of 'Allan P. McConnell' is also in full sun but the colour fades. And in only a little bit of shade, 'Wheee!' is doing well. I have others here who look great now but will start looking a bit crispy by the end of July.