The most beautiful - most stable blue hydrangea. Blooms all summer! True-Blue Hydrangeas have masses of True-Blue flowers that measure up to 1' across. Creates spectacular foundations and specimen plantings. It is a hardy plant to 20 below zero. The True-Blue Hydrangea thrive in partial shade and grow well in bare, shady spots along the north side of the house. Grow 3-6' tall and have neat growing habits. Nature's soil tester - plant some Blue Hydrangeas among your acid-loving plants. If blooms are a nice blue the soil is acid enough. If blooms start turning pink add some Ferrous Sulfate to the soil. Fragrant and good for cutting.