Extremely cold-hardy Viburnum carlesii is hardy from zones 2 – 8. Chinese snowball viburnums have the largest, showiest, and, dare we say, the floofiest of all snowballs. These multi-flower ...

should instead consider the Chinese snowball (Viburnum macrocephalum) which is strong in zones 6 through 9. One somewhat confusing species of this undeniably beautiful plant is Viburnum opulus.