The four seasons
Hydrangea - Fireworks of Sumida
When a potted plant was purchased last year, it had pure white flowers.
After flowers finished blooming, I planted it in the ground.
Then, the bluish flowers bloomed this year.
When the soil is made into neutrality, pure white flowers may bloom again next year.
This is an magnified image in the part of a true flower.
a close-up of petals and sepals