I grew this a few years ago in my search for the perfect yellow. The color started off yellow enough, with great form, and a good bud count. Unfortunately by afternoon the color had bleached out. I don't remember a problem with the substance of the petals being affected by the sun just the color. They say there are lots of yellow daylilies in the daylily world, but a non fading yellow is not as easy to find as it would first appear. America's Most Wanted in not one of them......Maryl