What's the best type of hydrangeas to plant in Zone 5 areas? I have four Endless Summer hydrangeas, the oldest of which is 10 years old. We take really good care of them, wrap them in leaves, surrounded by chicken wire in burlap in the winter. Unfortunately, last year most flowered very little and one did not flower at all. I love these plants, but I'm wondering if I should remove them and start with something else.
