(Common name: reblooming mountain hydrangea) Hydrangea ‘Endless Summer’ is a remarkable flowering shrub known for its ability to produce blooms on both old and new wood, extending the flowering season. It showcases large, mophead flowers in shades of pink or blue, depending on the soil pH. ‘Endless Summer’ thrives in partial shade and typically reaches a mature size of 3 to 5 feet (0.9 to 1.5 meters) in height and width, making it a versatile choice for borders, hedges, or container gardens.