I am surprised you have it growing in a sunny location. I have been told it is pretty invasive. I brought some home to my shade garden under the oaks nine years ago. I planted it way in the back as a sort of dividing line between my garden and the woods. I wanted it to brighten up the back edge. I also planted it in a ditch that boarders my property. After a week of weeding the mess in the ditch I wanted something that would choke everything else out. Seven years later the ditch is finally full. I am getting scattered patches through out my garden but nothing horridly invasive. My garden is full shade, well drained rich soil that I water weekly. The ditch is dry, sandy,mostly shaded. In my garden it doesn't "bloom", not enough sun I assume. In the ditch it does and looks very nice. That all said I would say I think the snow on the mountain will definitely grow in your new area. The question is will it grow too well for you?

Thanks for the info arcy. I did have a problem with its invasiveness when I first moved in but it stays contained in the area bordering my driveway and neighbor's. The neighbor had it all along the west side of his fence. I just planted bushes within it lilacs and viburnums) and they coexist happily with it. The other two, non-woody plants I had there are Boston ivy and ditch/tiger lilies so the three invasive herbaceous plants all duke it out for some turf (LOL). I found one volunteer snow-on-the-mountain in another part of my garden but I just plucked it out last year. I've been in this house over nine years now and that's the only outlier so far...