What should I do if the whole leaf of the rhododendron plant is white and yellow?

Rhododendron is maintained in this way, and the leaves are black and shiny and not yellow.

Rhododendron flowers prefer acidic soil, warm and humid environments, and avoid sun exposure. The yellowing of the leaves is due to the presence of iron deficiency in the soil, and a certain amount of ferrous sulfate is added during fertilization. The leaves will gradually return to normal.

The water quality in the northern region is alkaline, and acidic fertilizers are appropriately used to adjust the pH of the soil.

The leaves of the rhododendron are whitish and yellow, which is called yellowing (also known as iron deficiency), water alum fertilizer once every 15-20 days, as long as it can be persistent, there will be no disease, the rainy season adopts ferrous sulfate and cooked rot cake fertilizer burial method, the effect is also good.

Add a small amount of ferrous sulfate every week and you're good to go.

In summer, the rhododendron is prone to the phenomenon of whitish leaves, and it can automatically recover after the temperature is reduced, especially the western cuckoo, which has poor heat resistance and is prone to this phenomenon.

Of course, it is necessary to check whether the rhododendron has red spider insect infestation, the high temperature, dry and unventilated environment is easy to cause red spider disease, and there will be dense white or yellow spots on the leaves, which is a bit similar to the picture, red spider is more harmful, which will cause a large number of rhododendron to fall leaves, and even die of plants, do not take it lightly, if you find that there are insects on the leaves, you can spray some avermectin or gramite to kill.

Some rhododendrons are more difficult to survive in summer, so they should do a good job of shading and cooling in summer, and maintain good ventilation. In summer, the rhododendron enters the dormant period and grows slowly, so it is best to stop fertilizing and wait for the weather to cool down before chasing Bika water-soluble fertilizer.

Rhododendron summer watering is very critical, generally in the morning and evening watering, rhododendron likes high humidity environment, but is afraid of waterlogging, the general method is to water the roots to see dry and wet, foliar spray moisturizing. In addition, it can be isolated for a longer time than carbendazim or chlorothalonil to prevent root diseases.

Summary. Hello, the second reason for the yellowing of the new leaves of azalea is yellowing, the new leaves are yellowish and white, the veins are clearly visible, the old leaves are normal, as the new leaves grow, the leaf color will not deepen, but will become lighter and lighter, or even completely white, and the original normal middle and upper leaves will also begin to show this symptom. Rhododendron yellowing is mainly caused by alkaline soil and iron deficiency, and the higher the temperature, the more serious the situation, so yellowing is very common in summer.

Rhododendron yellowing is also very good**, foliar spray or root watering a little ferrous sulfate, acidifying the soil and supplementing iron, the leaf color will gradually return to normal. But if the yellowing is severe, the recovery will not be so fast, at least one or two months, and at most three or four months.

Hello, the second reason for the yellowing of the new leaves of rhododendron is yellowing, the new leaves are yellowish and white, the leaf veins are clearly visible, the old leaves are normal, as the new leaves grow, the leaf color will not deepen, the limbs will become lighter and lighter, and even completely white, and the original normal middle and upper leaves will also begin to appear this symptom. Rhododendron yellowing is mainly caused by alkaline soil and iron deficiency, and the higher the temperature, the more serious the situation, so yellowing is very common in summer. Rhododendron yellowing is also very good**, foliar spray or root watering a little ferrous sulfate, acidifying the soil and supplementing iron, the leaf color will gradually return to normal.

However, if the yellowing is severe, the recovery will not be so fast, at least two months, and at most three or four months.

That's right. No, it isn't.

It's the white of that leaf.

That should be rhododendron powdery mildew. The whitish appearance of the rhododendron leaves is usually caused by powdery mildew infection, which can be solved by two methods. One is to use green onion liquid, 50 grams of green onions mixed with 50 grams of water, soak for 12 hours, then fill the juice in a watering can and spray it on the leaves.

Many times a day, three or four days can be effective. The second is to use rice vinegar, according to the ratio of 1:150, sprayed once a week, three or four times in a row to see the effect of the hall mold.

You try the above method and it will improve after a week.

Ok thanks.