Hydrangea Flower Facts. The stems bear thin leaves of heart or oval shaped sharply toothed and 6 inches long. A low soil pH allows hydrangeas to absorb aluminum which turns the flowers a beautiful blue color.
Each individual Hydrangea flower is relatively small. The hydrangea was first cultivated in Japan but ancient hydrangea fossils dating back to 40-65 million years. 17112013 Hydrangeas are generally flowering shrubs that grow from 1 to 3 metres 3 to 10 feet in height but some species are trees or climbers with some climbing up tall trees.
A low soil pH allows hydrangeas to absorb aluminum which turns the flowers a beautiful blue color.
Each individual flower is relatively small. Hydrangeas produce flowers from early spring to late autumn. Most are shrubs 1 to 3 meters tall but some are small trees and others lianas reaching up to 30 m 98 ft by climbing up trees. 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.