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PlantSnap
Plant Care
Mountain hydrangea
(Hydrangea serrata)
Also Known As
Mountain hydrangea, Tea of heaven
About This Plant
Hydrangea serrata is a species of flowering plant in the family Hydrangeaceae, native to Japan and Korea. It is a deciduous shrub that typically grows to 1-3 m tall and wide. The leaves are ovate to elliptic, 5-12 cm long and 3-8 cm broad, with a serrated margin. The flowers are produced in flat corymbs 6-12 cm diameter in early summer, with a lacecap-like arrangement of sterile flowers surrounding a central cluster of fertile flowers.
Plant Care Instructions
Outdoor Size Range
3-10 feet (0.9-3 m)
Light Requirements
Hydrangea serrata prefers partial shade to full shade. Direct sunlight can scorch the leaves and flowers.
Humidity Needs
Hydrangea serrata prefers high humidity levels. It can benefit from occasional misting or placement near a humidifier.
Fertilizing Schedule
Hydrangea serrata benefits from regular fertilization during the growing season with a balanced fertilizer. Avoid fertilizing in late fall or winter.
Pruning Guidelines
Hydrangea serrata should be pruned after flowering to remove dead or damaged wood and to shape the plant. Avoid heavy pruning, as this can reduce flowering.
Common Pests and Diseases
Common pests and diseases for Hydrangea serrata include aphids, spider mites, powdery mildew, and leaf spot.
Indoor Size Range
24-36 inches (60-91 cm)
Watering Schedule
Hydrangea serrata requires regular watering, especially during hot and dry periods. The soil should be kept moist, but not waterlogged.
Temperature Range
Hydrangea serrata can tolerate a wide range of temperatures, but prefers cool to moderate temperatures between 60-70°F (15-21°C).
Growing Season
The growing season for Hydrangea serrata is from spring to fall, with flowering occurring in early summer.
Growing Difficulty Level
Hydrangea serrata is moderately difficult to grow. It requires regular watering, fertilization, and pruning to thrive. It is also susceptible to pests and diseases.
USDA Hardiness Zones
Hydrangea serrata is hardy in USDA zones 6-9.
Did You Know?
In Japan, Hydrangea serrata is often used in traditional medicine to treat kidney and bladder problems.
