Hydrangea macrophylla 'Bailmer' - Aptly named, The Original Endless Summer(R)Hydrangea has great appeal because of the large, mophead flowers that begin to bloom in spring and repeat through fall. A very cold-hardy selection. Blooms are pink in alkaline soils and blue in acidic soils. Matures at 3 to 5 feet tall and wide. Excellent in mass plantings. Partial Shade.