Hydrangea Flower Size. A few species can tolerate zone 4 conditions -30F-34C including H. Hydrangea is a genus of about 100 species of flowering plants native to southern and eastern Asia from Japan to China the Himalaya and Indonesia and North and South America.
A few species can tolerate zone 4 conditions -30F-34C including H. It grows 6 feet tall and wide. Known as smooth hydrangea this shrub reaches around 3 to 5 feet tall and wide and produces white to pink flowers.
Hydrangeas may suffer when planted in hot temperatures or frost.
Reaching up to 15 feet in height the hydrangea grows quickly and often fills in a space in just one summer. 23112020 This is especially true with hydrangeas which can mature anywhere from 3 feet tall and wide to 30 feet tall and 15 feet wide depending on. Each individual Hydrangea flower is relatively small. 11072016 Mophead hydrangeas are the most recognizable and popular hydrangea due to their large puffy flower heads.