Hydrangea acuminata
Image: Okamoto, K. (cc-by)
NameHydrangea acuminata
Scientific NameHydrangea serrata var. acuminata
Common NamesMountain Hydrangea, Tea of Heaven Hydrangea, Amacha
Plant FamilyHydrangeaceae
Natural HabitatNative to mountainous regions of Japan and Korea, often found in woodlands, forest margins, and along streams, preferring moist, well-drained, acidic soils.
Parts Usedleaf
Medicinal Actionsdiuretic,anti-inflammatory,antioxidant
Traditional UsesTraditionally, the fermented leaves of Hydrangea serrata (especially the 'Amacha' cultivar) are used to make a sweet tea called Amacha, consumed ceremonially and as a sugar substitute. It has been used in traditional Japanese medicine for its diuretic properties, and sometimes for kidney and bladder issues, and as an anti-allergic agent.
Active ConstituentsPhyllodulcin, Hydrangenol, Isocoumarins
Preparation Methodsinfusion,powder
Contraindications & WarningsWhile the fermented leaves (Amacha) are generally considered safe, raw leaves and other parts of Hydrangea species can contain cyanogenic glycosides and other compounds that may cause gastrointestinal upset or toxicity if ingested in large quantities. Pregnant or breastfeeding women and individuals with kidney conditions should exercise caution.
Cultivation NotesThrives in partial shade to full sun (with adequate moisture), in moist, well-drained, acidic to neutral soil. Requires consistent moisture and protection from harsh afternoon sun.
Raritycommon
Description
A deciduous shrub native to East Asia, characterized by ovate, serrated leaves and lacecap-style inflorescences featuring small fertile flowers surrounded by larger, showy sterile florets. The leaves are typically dark green and can develop reddish hues.
