July 24, 2012
Ajisai (Hydrangea) flowers in Engaku-ji
The flowers of Ajisai change their colors beautifully as time goes by.
When these flowers bloom freshly, they are greenish-yellow due to the rich chlorophyll contained in them.
With the passage of time, this chlorophyll continues to be decomposed and blue or red pigments such as anthocyanin are synthesized in the flowers to progressively color them blue or red.
Approaching the end of the flowers, they become tinged with red increasingly because of the organic acid resulting from their aging.