Rhododendron glandularis is suitable for a cool and humid environment. The suitable temperature for growing is between 12 ~ 25 ℃, if the temperature is too high or even more than 30 ℃, azalea will be dormant in summer, so we should pay attention to the sun protection of azalea in summer when the temperature is too high.
Rhododendron glandularis likes acid soil with good fertility, looseness, permeability and drainage. If it is necessary to plant in the north, because there are many alkaline soils in the north, it is necessary to mix the soil with humus soil with pine needles. Watermelon or tomato can also be cut into small pieces and put into the soil, which has a very good effect on improving the quality of flowers and soil. It should be noted that no single clay or alkaline soil can be used.
The flowering period of azalea glandular fruit can be controlled by oneself. If you want the azalea to bloom ahead of time, you can move the azalea to a greenhouse. The temperature should be controlled between 20-25 ° C, and the Rhododendron branches and leaves should be sprayed with water frequently. It will be able to bloom in about 45 days. If you want to delay the flowering time of azalea, put the azalea that has formed flower bud in a low temperature environment, keep the temperature at 2-4 ° C, put the summer and Autumn Festival outdoors, and it will bloom in two weeks.
The best way to water azalea is to use rainwater or river water. If the tap water in the water pipe is used, the water should be poured into the container for about 2 days, and the chlorine in the water can be discharged. When growing vigorously, water once every 7-10 days. Add a little ferrous sulfate to the water to ensure the acidity of the soil.
It is not necessary to change basin and soil every year when breeding Azalea. It can be changed once every 2-3 years. Because the root system of azalea glandular fruit is thin, it can reduce the damage to the roots.
We should also pay attention to the prevention of the diseases and insect pests of azalea, red spider, aphid and other pests, which can be killed by spraying such as pyrethroids. The effect is relatively good. It will not die after spraying for three days, and it will be sprayed again.
