Hydrangea paniculata 'White Moth'
White Moth Panicle Hydrangea. White Moth is one of the most vigorous and largest growing of the "Peegee" types. It's inflorescence is large and roundish, not oblong or conical as most are. I have seen flower heads as large as a volley ball. If you want a tree type or a standard, this is the best selection for this treatment. As all in this group, it does best in full sun, and since it flowers on current seasons wood, one can prune it back heavily in late winter or early spring.