Hydrangea Serrata

Description

Hydrangea Serrata, also known as Mountain Hydrangea, is a deciduous shrub that belongs to the Hydrangeaceae family. It is native to the mountains of Japan and Korea and is popular for its stunning, lacecap flowers that bloom in summer. The flowers come in shades of pink, blue, and purple, depending on the pH level of the soil. The leaves are serrated and have a glossy, dark green color that turns burgundy in the fall. The shrub can grow up to 6 feet tall and 8 feet wide.

Taxonomic Information

Appearance

The Hydrangea Serrata has a compact, rounded shape with a dense foliage of glossy, serrated leaves that are 2-6 inches long. The flowers are arranged in flat-topped lacecaps that are 4-8 inches in diameter. The outer flowers are large and sterile, while the inner flowers are small and fertile. The colors of the flowers range from pink, blue, and purple, and can change depending on the pH level of the soil. The bark of the shrub is gray-brown and peels off in strips.

Care Guide

The Hydrangea Serrata prefers moist, well-drained soil that is rich in organic matter. It needs regular watering, especially during the hot summer months, but make sure not to overwater as it can lead to root rot. Fertilize the shrub in early spring with a slow-release fertilizer that is high in phosphorus to encourage blooming. The shrub prefers partial shade to full sun and is hardy to zone 6-9.

Common Pests & Diseases

The Hydrangea Serrata is susceptible to a few pests and diseases, including spider mites, aphids, powdery mildew, and leaf spot. Spider mites and aphids can be controlled with insecticidal soap, while powdery mildew and leaf spot can be prevented by providing good air circulation and avoiding overhead watering.

Habitat

The Hydrangea Serrata is native to the mountains of Japan and Korea, where it grows in woodland areas and along streams. It prefers a cool, moist environment and is often grown as an ornamental shrub in gardens and parks.

Question and Answer

Q: How do I change the color of the Hydrangea Serrata’s flowers?
A: The color of the flowers can be changed by adjusting the pH level of the soil. For blue flowers, the soil should be acidic (pH 5.5 or lower), while for pink flowers, the soil should be alkaline (pH 6.0 or higher).

Q: When is the best time to prune the Hydrangea Serrata?
A: The best time to prune the Hydrangea Serrata is in late winter or early spring, before new growth appears. Prune back any dead or damaged branches and cut back old wood to encourage new growth and blooming.

Q: Can the Hydrangea Serrata be grown in containers?
A: Yes, the Hydrangea Serrata can be grown in containers, but it will require more frequent watering and fertilizing. Make sure to choose a large container that can accommodate the shrub’s root system, and use a well-draining potting mix.

Q: How often should I fertilize the Hydrangea Serrata?
A: Fertilize the Hydrangea Serrata once a year in early spring with a slow-release fertilizer that is high in phosphorus to encourage blooming. Avoid fertilizing during the summer months as it can burn the roots.

Related Plants

• Hydrangea macrophylla
• Hydrangea paniculata
• Hydrangea quercifolia
• Hydrangea arborescens

References

• “Hydrangea serrata.” Missouri Botanical Garden. Accessed 23 Aug. 2021. <http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=277685&isprofile=0&basic=hydrangea%20serrata>.
• “Hydrangea serrata.” Royal Horticultural Society. Accessed 23 Aug. 2021. <https://www.rhs.org.uk/plants/24867/hydrangea-serrata/details>.
• “Hydrangea serrata.” The Spruce. Accessed 23 Aug. 2021. <https://www.thespruce.com/growing-hydrangea-serrata-1402763>.