Name: Hydrangea paniculata ‘Grandiflora’ aka peegee hydrangea, or panicle hydrangea.
Type of Plant: A large growing shrub – one of the first cultivars in the paniculata group of hydrangeas. These are hardy plants that grow well in full to part sun. And they will grow large as well, reaching 10 to even 20 feet tall and wide.
You can prune this as a multi-stemmed shrub, a multi-stemmed small tree, or find it grafted on a single trunk in a tree form. Hardy in Zones 3-8, this Hydrangea has flowers that are white at the end of July or early August, and turn pink in the fall.
Why I love this: This plant is how many of the paniculata group came to be known as peegee hydrangeas. It’s the abbreviation P.G. which stands, of course, for paniculata ‘Grandiflora.’ And once you’ve grown this plant and seen how large the flowers get, you know why ‘Grandiflora’ is so appropriate!
A Word to the Wise: The flowers are so large on this plant that when it rains they can bend to the ground. To keep them out of the mud, allow the plant to grow large! Yes, you can prune it down hard every year in a probably doomed effort to keep it small, but then the flowers, which form at the ends of the stems’ new growth, will always end up on the ground. So plant this where it can get large and use the shorter “Bobo” in places where a smaller hydrangea is needed.