Hydrangea acuminata
Image: Togasi, M. (cc-by)
NameHydrangea acuminata
Scientific NameHydrangea serrata var. acuminata
Common NamesMountain Hydrangea, Tea of Heaven
Plant FamilyHydrangeaceae
Natural HabitatNative to mountainous and woodland areas of Japan and Korea, thriving in moist, well-drained, and often acidic soils in partial shade.
Parts Usedleaf
Medicinal Actionsdiuretic,anti-inflammatory,antioxidant
Traditional UsesTraditionally, the leaves of certain varieties of Hydrangea serrata, including 'Amacha' (sweet tea), are used in Japan to make a sweet beverage for ceremonial purposes, particularly during Buddha's birthday. Medicinally, it has been employed for its diuretic properties, aiding in the treatment of urinary tract issues and kidney stones, and as a general tonic.
Active ConstituentsHydrangenol, Phyllodulcin, Saponins, Coumarins
Preparation Methodsinfusion,decoction,powder
Contraindications & WarningsMay cause gastrointestinal upset, nausea, or dizziness in large doses. Caution is advised for individuals with kidney disease or those taking diuretic medications.
Cultivation NotesPrefers moist, well-drained, acidic to neutral soil and partial shade, though it can tolerate full sun if soil moisture is consistently maintained. Requires protection from harsh afternoon sun in warmer climates.
Raritycommon
Description
A deciduous shrub characterized by its ovate to elliptic, serrated leaves and flat-topped to domed flower clusters (corymbs). The flowers typically feature small fertile florets surrounded by larger, showy sterile florets, often changing color with soil pH.
