2. Lighting. Alpine rhododendrons like semi-shading. The bigger the leaves, the more shade they need. Generally, shading nets with shading rate of 20% ~ 30% are used in spring and autumn, and shading nets with shading rate of 70% are used in summer to achieve the purpose of cooling and humidifying, so as to maintain the growth of rhododendrons on the mountain all year round.
3. Moisture. Potted rhododendron alpine requires that the soil in the pot should always be moist and the relative humidity of the air should be high.
4. soil. I like loose and fertile mountain humus soil to avoid hardening, stagnant water and saline-alkali land.
5. fertilizer. Fertilization should be done with thin fertilizer and diligent application, and it is not suitable to apply large fertilizer, thick fertilizer and raw fertilizer except adding appropriate amount of base fertilizer to the basin soil.
6, plastic trimming. After flowering, close branches, residual branches, dead branches, cross branches, slender branches, long branches and diseased branches should be cut off in combination with changing pots.
7. Flowering regulation. Rhododendron alpine is generally pregnant in July and August, and the bud development time is longer. After entering the greenhouse in winter, the buds are still developing. At this time, it is easy to control the flowering period of New Year's Day and Spring Festival by controlling the temperature. If the greenhouse temperature is maintained at 15 ~ 20℃, it will take about 20 days to bloom. Delaying flowering, the temperature can be kept at 5 ~ 10℃, and the temperature can be increased before flowering.