1、 Suitable temperature

Rhododendron will go into dormancy in winter. If you want to bloom, you must provide higher temperature to make it continue to grow. The ambient temperature should be controlled at about 15-30 ℃, not lower than 12 ℃, otherwise it will grow slowly and is not conducive to flowering

2、 Sufficient light

If you want the azalea to blossom, you need enough light. In winter, the time of day is shortened, but the light is soft and can be in the sun all day. Of course, we should also pay attention to heat preservation while lighting. We can put it on the balcony or windowsill indoors, and put plastic bags outdoors to keep the temperature

3、 High humidity

Rhododendrons need a lot of water, especially before flowering, they must be watered enough. In addition, the environmental humidity should be improved as much as possible, and the surrounding water can be sprayed for humidification. The water temperature in winter should be strictly controlled. Cold water will frostbite plants, which needs to be close to the indoor temperature

4、 Rational fertilization

Fertilization is generally not suitable in winter, but in order to promote flowering, it needs to be supplemented with certain nutrients. In autumn and winter, some rotten organic fertilizer can be applied and diluted before use to ensure that the roots will not be hurt. After that, topdressing shall be carried out every 15-20 days, and urea and potassium dihydrogen phosphate shall be selected to supplement various nutrients. In addition, foliar fertilizer can be applied once a week, which is more conducive to absorption. After it blooms, fertilizer must be stopped in time