How to treat yellowing of azalea leaves

reason

Alkaline soil and water

The soil and water in the northern region contain more salt and alkali, and azalea is an acid-loving flower. If there is a lack of soluble iron in the soil and water, the azalea will have yellow leaves. Therefore, when planting, try to choose acidic soil, and water it with more alum water or vinegar during the growth period.

Improper lighting

Azalea likes cool and shady conditions, but if it is placed in a shaded place for a long time, or the light is too strong, it will cause the branches and leaves of the azalea to grow too long, the leaves to be thin and yellow, and it will not bloom or even bloom very little. The flowerpot needs to be moved to a sunny or shady place in time.

Strongly stimulated

The leaves of azalea are relatively fragile, and a series of pesticides sprayed to prevent diseases and pests may cause the leaves to turn yellow. If the concentration of the pesticide is too high, there are residual toxic gases, or the environment suddenly changes temperature or fluctuates between hot and cold, the tips or surfaces of the azalea leaves will turn yellow and dry. Pesticides should be used rationally to reduce unnecessary air pollution.

Improper temperature

The suitable growth temperature for azalea is 15~25℃, and it can safely survive the winter if the temperature is above 10℃. However, the weather is changeable in winter. If azalea is not moved indoors in time or is blown directly by cold winds, it is easy to suffer from frost damage, resulting in yellow leaves, and in severe cases, it may even wither and die. Therefore, move the azalea indoors in mid-October every year for maintenance, place it in a sunny place, and control the room temperature at around 10℃.

How to treat

In addition to controlling the temperature, water, sunlight, and soil mentioned above, you also need to pay attention to a few points:

Change the pot in time

Repotting should be done once every two years in spring or late autumn. The potting soil should be slightly acidic sandy soil that is rich in humus, fertile and loose. When repotting, only replace 1/3 of the soil to avoid excessive changes in the soil environment that may affect plant growth.

Timely pruning

Rhododendrons should be pruned once a year after flowering, cutting off diseased and weak branches and shortening overgrown branches. This will not only promote the growth of the plant, but also ensure a perfect plant shape and reasonable branch distribution. Proper pruning can enhance the light transmittance of the plant and promote the flowering of azalea.