Rhododendron is more suitable to grow in acid soil, while the soil in the north is mostly alkaline, so it is necessary to prepare basin soil. Generally, the mixture of rotten leaf soil and sandy soil can be used as the base fertilizer. Before planting, we must mix well, and at the same time, we should change new pots and new soil every spring.
Rhododendron can't be irrigated with tap water because tap water itself has chlorine and is alkaline at the same time. It can be used after a few days standing. Add a few drops of white vinegar to the water, or acidify it with ferrous sulfate. Acid water irrigation is more conducive to its growth, but also to improve soil quality.
Rhododendrons prefer a humid environment, while the air in the north is drier. It can spray water on its leaves or on the ground every day, which can increase the humidity of the air. Indoor culture can use humidifier, can also effectively humidify
The temperature of Rhododendron in winter should not be lower than 5 ℃, and it can be put in the place with indoor heating in the north winter. But don't keep the azalea too close to the heat. High temperature baking will also cause damage to it, and a certain distance should be kept. At the same time, regular ventilation is needed to avoid various diseases caused by air non circulation.
