Sweet Hydrangea

Hortensia serrata var. thunbergii

  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Sweet Hydrangea
  • Flower name
    Sweet Hydrangea
  • Scientific name
    Hortensia serrata var. thunbergii
  • Alias甘茶, Sweet Hydrangea, ヤマアジサイ, 山紫陽花, アマチャ
  • Place of originJapan
  • Place of floweringLow mountains
  • Flowering seasonMay, June, July

What is Sweet Hydrangea

Sweet Hydrangea, or amacha(sweet tea), (Scientific Name: Hortensia serrata var. thunbergii) is a cold-hardy deciduous shrub, a variety of the Mountain Hydrangea, native to Japan. In Japan, it grows wild in forests and hillsides. In English, it is known as Sweet Hydrangea.

The plant grows to a height of about 100 cm.
The leaves are elliptical with serrated edges and are arranged oppositely on the branches.

From May to July, it produces corymbs or panicles of flowers, 15-30 cm in diameter. The plant bears both fertile and sterile flowers. The fertile flowers, found at the center, appear as small blue grains with five sepals, five petals, ten stamens, and three pistils. The sterile flowers are a few in number and surround the fertile ones. The color of the sterile flowers starts as pale purple and gradually changes to pale pink.

Tea and medicinal sweeteners unique to Japan are made from the leaves of this plant.

Common name: Sweet Hydrangea, or amacha(sweet tea),
Scientific name: Hortensia serrata var. thunbergii,
Origin: Japan, Environment: In the forest,
Life type: Cold-resistant deciduous shrub,
Tree height: 100 cm, leaf color / stalk / stem color: magenta,
leaf shape: oval, phyllophy: opposite, leaf margin: sawtooth,
inflorescence: corymbs or panicles of flowers, flower color: pale purple → pale pink, flowering Period: May to July,
flower diameter: 15 to 30 cm, amphoteric flowers (frame): 5, petals: 5, stamens: 10, pistils: 3, decorative flowers: several,
use : Leaves are sweet tea and medicinal sweetener.


  • Order
    Cornales
  • Family
    Hydrangeaceae
  • Genus
    Hydrangea
  • Species
    H. serrata var. thunbergii
  • Type of flower
    Radial symmetrical flower
  • Array of flower
    Cone / Compound inflorescence
  • Petal shape
    Five-petal
  • Leaf type
    Oval
  • Edge of the leaf
    Serrated
  • Life typecold-hardy deciduous shrub
  • Flower colorsPink Purple
  • Colors of the leavesGreen
  • Fruit color
  • Height100.0 ~ 200.0 cm
  • Diameter of flower15.0 ~ 30.0 cm

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