Endless Summer Mophead Hydrangea hydrangea macrophylla bailmer PP15, 298 The first repeat blooming mophead Hydrangea. Remove spent flowers to have blooms from spring to fall. A Bigleaf Hydrangea plant with flowers that form on the current year's growth as well as on old wood. Endless Summer can bloom for more than six months in warm areas, especially if deadheaded regularly, and the flower heads - blue in acid soils, or pink, purple multi colored in alkaline soils - are up to 9in across Mature Height : 3-4 Feet Mature Width : 3-4 Feet Exposure : Shade to partial sun Hardiness Zones : 4-9