“The climbing hydrangea (H. petiolaris) is another magnificent plant,” Ballato says. “It’s fragrant like you can’t believe.” It’s the perfect plant to grow vertically in a semi-shady ...

and Hydrangea petiolaris, both of which are commonly referred to as climbing hydrangeas. These plants have a similar appearance, with flat umbel-like blooms, but the Hydrangea anomala species is ...