Hydrangea in the photo is one of the most common ornamental plants. Hydrangeas belong to the hydrangia family, some reference books classify them as the saxifrage family.
The hydrangea in the photo is a perennial shrub with opposite dark green leaves. The fruit is a polyspermous capsule.
Growing a hydrangea in a pot, you can get a bush with large showy inflorescences, which form from 1 to 7. They are located above the top leaves. In the open field, one hydrangea bush can decorate up to 100 (and sometimes more) globular inflorescences. The smaller the flowers and inflorescences, the larger. The uniqueness of hydrangea - in the ability to easily change the color of inflorescences... Why, before flowering, the bush is watered with aluminum alum (5 grams per 1 liter of water). In this case, the white sepals will turn blue, the pink ones will turn lilac. If you add iron salts to the substrate, the color of the sepals will be blue.
Hydrangea is shade-tolerant plant, feels good both in light and semi-shaded places, but the flowering plant does not tolerate direct sunlight, requiring shading.
During growth, the hydrangea bush evaporates a lot of water and quickly fades with a lack of moisture, recovering with difficulty. That is why, from spring to autumn, hydrangea watered abundantly soft settled water, only drainage is needed. The plant is rarely watered at rest, only so that the earthen lump does not dry out.