Here are some of the hydrangea varieties that can change colors: Nikko Blue Hydrangea (Hydrangea macrophylla ... (learn more about how to care for hydrangea bushes here). If you want to change ...

Nikko Blue hydrangeas are a real showstopper ... In most cases, watering them once or twice a week, taking care not to let them become waterlogged, should more than suffice.