What happens to azaleas with yellow spots on their leaves

1.Fertilization accidentally sticks to the leaves; 2.Pest.

Hello, here's why:

1. The soil is unsuitable.

In most areas of the north, the soil and water contain more salt and alkali, and the rhododendron is an acidic soil flower, and the leaves will gradually turn yellow due to the lack of soluble iron and other elements that can be absorbed by the soil. Acidic soil should be used for planting, and alum fertilizer and water should be often watered during the growth period.

2. Overwatering.

Excessive watering and long-term wetness of the potting soil cause hypoxia in the soil, causing some fibrous roots to rot, hindering normal respiration and absorption of water nutrients, and causing the leaves to turn yellow and fall off.

After the damage, the young leaves first turn pale yellow, and then the old leaves gradually turn yellow, watering should be controlled immediately, fertilization should be suspended, and the soil should be loosened frequently, so that the soil is well aerated.

3. Dense and not ventilated.

If too much nitrogen fertilizer is applied, the branches and leaves will grow more luxuriantly, and if they are not pruned for a long time, the inner branches and leaves will not have enough light, which will easily cause the leaves to turn yellow and fall off. Fertilizer should be applied reasonably and pruning should be strengthened to make it ventilated and transparent.

4. Improper fertilization.

Long-term failure to apply ammonia fertilizer or change the pot and soil, the lack of nutrients such as nitrogen in the soil leads to thin branches and leaves, thin and yellow leaves. It is necessary to pour the pot in time, replace it with new loose and fertile culture soil, and gradually increase the nitrogen fertilizer of Haihai and Weihai to promote the growth of rhododendron and improve disease resistance.

There are four main reasons why the leaves of azaleas turn yellow.

1. Soil discomfort: soil alkalinization affects the growth of rhododendrons, so it should be treated with vinegar solution.

2. Overwatering: Water accumulation in the roots leads to poor leaf growth, and the tilted pot discharges excess water.

3. Improper fertilization: For the sake of using nitrogen fertilizer alone, spray the leaves with potassium dihydrogen phosphate.

4. Too strong light: move into a semi-shaded place for breeding.

There is no need to rush when the rhododendron leaves are yellow, there are 3 ways to solve it, the leaves are green, and the flowers are bursting.

You can often pour water soaked in apples.

There are these reasons why the rhododendrons that are maintained at home have yellow leaves.

There are these reasons why the rhododendrons that are maintained at home have yellow leaves.

Causes of yellowing of rhododendrons: caused by unsuitable environment, improper fertilization, improper watering, unsuitable soil, pests and diseases, etc.

Rhododendron yellowing and losing leaves is most likely due to lack of water or cold.

There are these reasons why the rhododendrons that are maintained at home have yellow leaves.

There are these reasons why the rhododendrons that are maintained at home have yellow leaves.

The yellowing of the leaves of rhododendrons is mainly caused by physiological and pathological diseases.

1. Physiological diseases are mainly in the process of growth and development, due to the influence of temperature, light, water, fertilizer and other conditions, resulting in many physiological disorder diseases, such as sunburn, lack of nutrients, etc.

2. Pathological diseases mainly refer to diseases caused by pathogens such as fungi, bacteria, viruses, mycoplasmas, nematodes and parasitic seed plants.

3. In addition to the lesions of the external organs of crops, such as discoloration, necrosis, decay, wilting and deformity, pathological diseases also produce some symptoms of pathogens at the disease site of the plant, such as powder, mildew, spot, rust, coal stain, sclerotia and pus.