Endless Summer Hydrangea macrophylla is one of the most famous rebloomers. Introduced in 2004, it allowed gardeners in Northern climates to be able enjoy hydrangeas in their gardens. It features big mophead clusters of blue or pink flowers and grows 5 feet tall and wide. Zones 4-9
firework aster These perennial flowers grow well in average soils, but needs full sun. Aster flowers come in blues, purples and a variety of pinks. All Asters are yellow in the center of the flower. They are daisy-like in appearance, even though they are a member of the sunflower family.