Mountain Hydrangea
Mountain hydrangea (Hydrangea serrata) is a compact, deciduous shrub native to the mountainous regions of Japan and Korea. It is closely related to the Bigleaf hydrangea (Hydrangea macrophylla) but offers a more delicate appearance with smaller leaves and flowers. Known for its ability to thrive in cooler climates, this hydrangea variety adds subtle charm to gardens with its lacecap blooms and seasonal color changes. It grows well in USDA Hardiness Zones 6-9.
Flowers and Seasonal Interest: Mountain hydrangeas produce lacecap flowers, which feature a ring of large, showy sterile florets surrounding tiny, fertile ones. Blooming occurs in early to late summer, with colors ranging from soft blue to pink, depending on soil pH. Acidic soil tends to produce blue flowers, while alkaline soil encourages pink blooms. This variety offers additional seasonal interest as its leaves turn burgundy or red in autumn, adding vibrant color to the landscape.
Uses: This hydrangea is perfect for mixed borders with companion plants, as a flowering hedge, or in mass plantings for stunning visual impact. It is also suitable for small gardens and patio containers. The blooms also make excellent cut flowers, adding elegance to floral arrangements. They can also be dried and preserved for use in wreaths and home decor, allowing you to enjoy their beauty year-round.
Growing Conditions: Mountain hydrangeas thrive in partial shade, preferring morning sun with afternoon shade to protect them from excessive heat. They need moist, well-drained soil rich in organic matter to perform their best.
Pruning and Maintenance: These hydrangeas bloom on old wood, meaning flower buds form the previous season. To avoid removing next year’s blooms, prune lightly after the flowers fade in late summer. Deadheading spent blooms throughout the season encourages continuous flowering. They generally require minimal maintenance beyond occasional pruning and watering.
All parts of the plant are considered poisonous if ingested due to the presence of hydrangin, a cyanogenic glycoside. It’s generally safe for humans to handle, but ingestion can cause discomfort. Hydrangea is considered toxic to pets, including dogs and cats.
