Hydrangea trees are deciduous flowering plants and can grow to a height of 10 to 25 feet. The number of species of hydrangea trees goes to more than 100 and there are several subspecies of this plant. The type of flowers and their size vary a great deal, thereby making it difficult to generalize hydrangea tree species.
Caring for Hydrangea
Make sure you don't plant the tree near another tree as it would fail to grow properly. The main reason for this is that, the roots of the other trees nearby would grow very aggressively as the soil around the hydrangea tree is moist, thereby not letting the hydrangea root to grow to its full potential.