Hydrangea macrophylla 'Bloomstruck' The Endless Summer Bloomstruck Hydrangea, hydrangea macrophylla is a compact hydrangea that blooms all summer long. Large, 3.5�-5� pink or purple blooms, depending on soil pH. Dark green foliage takes on a burgundy-red color in the fall. Height 3-4 ft spread 4-5 feet