Reason: in winter, if the azalea is placed under 10 ℃ for a long time, or let it be directly blown by cold wind, it may be frostbitten, and then produce yellow leaves.
Solution: first, move it to a place where the indoor temperature is higher than 10 ℃, then cut off the frozen branches and leaves, and slowly maintain
Reason: if the Rhododendron is watered too much, it will cause water accumulation in the soil, which will affect the respiration of Rhododendron root system, and make it unable to produce nutrients from the soil. And without nourishment, its leaves are likely to turn yellow.
Solution: use stones to raise the flowerpot, and then put it in a ventilated place to volatilize the excess water in the soil. After that, don't pour too much water in the process of raising it.
Reason: Rhododendron grows vigorously and needs to be pruned once a year. If it is not pruned, it will grow very luxuriant. Branches and leaves will block each other, affect ventilation and light transmission, so that some leaves will not get enough oxygen and light, and then turn yellow.
Solution: prune Rhododendron in time. It's better to prune once a year after flowering. If it's too dense, cut away the sick and thin branches.
Reason: Rhododendron is like acid conditions of the flower, if long time with alkaline water, it will produce yellow leaves.
Solution: use acid water to pour it, or add a few drops of vinegar to the water.
