Plant Profile: Hydrangea serrata

More resilient and compact than H. macrophylla, this plant was once categorized alongside lacecap hydrangeas because of its flat flower heads. However, it stands out as a smaller, denser variety with diminutive leaves and blossoms. The flowers feature clusters of tiny florets at the center, surrounded by a few larger, eye-catching florets on the periphery. Their color ranges from blue to pink, depending on the soil's pH level, and some cultivars exhibit a mophead shape.

This hydrangea requires minimal pruning, which should be carried out after flowering since it blooms on stems from the previous year. It typically grows about 18 inches annually. In early spring, any weak or winter-damaged stems should be removed.

While this plant can thrive in full sun or partial shade, it is native to Asia and favors cooler growing conditions, flourishing best in light to open shade. In hotter regions, placing it in a spot shielded from intense sunlight will help prevent the leaves and flowers from fading or scorching prematurely, and consistent summer watering will encourage more abundant blooms.

This hydrangea may be more prone to powdery mildew compared to Hydrangea macrophylla due to its thinner foliage. It can also be vulnerable to bud blight, bacterial wilt, and leaf spot, and may occasionally attract aphids.

For further details on Hydrangea, please refer to additional resources.