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While the large, round flowers of hydrangeas are a treat for the eye, the dense, green foliage and the small petals increase the humidity and thus ensure a healthier indoor climate. The irrigation water, abundantly absorbed through the roots, transports the hydrangea towards foliage and blossom. There it evaporates and will give off to the surrounding air. Especially in the cold season, when heating air can cause dry skin and eyes as well as headaches, the houseplant will remedy the problem in a natural way.
Scientists at the research institute Fytagoras Plant Sciene in Leiden have discovered that no other houseplant examined so far improves the indoor climate as much as the hydrangea. It has been discovered that nine room hydrangeas raise low humidity from 30 percent to a healthier 40 percent within four hours. Especially in the cold winter months of January, February and March, at least two room hydrangeas per room should be planned to improve the indoor climate. The rule is: the more, the better!
In vessels with rust-optics, the hydrangea flowers are particularly good effect
In order for the hydrangea to evaporate so much, it should be watered regularly, so that the pot bale never completely dries - depending on size, location, sunlight and ambient temperature about two to three times a week, but waterlogging is to be avoided. Helpful is a drainage layer of clay granules. Checking the degree of moisturization of the potting soil with your finger will quickly tell you if watering is necessary.
Since the flowering houseplant prefers acidic soils, the irrigation water should be as low in calcium as possible. So that the joy of the opulent flowers lasts as long as possible, the plant is best placed in a place with plenty of daylight but without direct sunlight during the noon hours. As soon as the outside temperature slowly climbs back into the double-digit range, the room hydrangea can be repotted and spend the summer outdoors.