It depends. Obviously, the more sun they get, the more blooms they can produce. A lot of direct and indirect sunlight will also help smooth hydrangeas and paniculata blooms turn from lime green to white. The more sun they get, the faster they change from lime green to white.

I have had both in full but very bright shade locations. They bloom fine and the lime green blooms turn white after several weeks. But on years with lots of cloudy/rainy weather caused by El Nino Events, they have had difficulty. In one year in particular, the smooth hydrangea (Annabelle) and the paniculata (Little Lime) started blooming lime green as usual but the lime green blooms never turned white... and remained green until November, when they finally turned brown. But it wasn't a problem for me as I like the lime green blooms. ;o))

Thanks so much for your comments! I think I'll go ahead and try it. If they are really unhappy, I can always move them!

You could certainly try it with the arborescens but I wouldn't like to experiment with the climbers. First, it takes a number of years of establishment for them to start flowering to begin with. And moving them is a much bigger job than moving a shrub and will set them back to the beginning afa flowering is concerned.