I tried googling for info on this one but it was sparse. Generally hydrangeas sold for Mothers' Day are macrophylla varieties which are hardy at best to zone 5 but do not tend to have time to bloom there. This one, according to some sites, is a tree hydrangea, which should make it very hardy. The tree hydrangeas are less particular about soil types, drier conditions and sun but that does not mean they would not benefit from part shade, well-drained, moisture-retentive soils and acid fertilizer (like what is sold for rhodos).
Many a great tune has been played on an older fiddle.