What to do when azalea leaves curl and turn black? Find the cause and they will recover quickly

Why do azalea leaves curl and turn black after the flowers finish blooming?

Azalea leaves curling usually has only two causes: one is insufficient air humidity, and the other is excessive nutrient depletion. Azaleas like very high air humidity, and when the air humidity is not high enough, their leaves will curl. If the air in your home is rather dry, it is recommended that, while keeping good ventilation, you mist it every morning and evening. It should recover within just a few days.

Because the azalea consumes a lot of nutrients after blooming, curling can occur. At this time we must replenish nutrients promptly. You can water it with a mixed nitrogen-phosphorus-potassium fertilizer, and it will recover in about a week. So, whether or not the leaves are curling, after an azalea finishes blooming you must promptly replenish nutrients for it. Because plants use up a great deal of nutrients when they bloom.

Azalea leaves turning black is usually caused by root damage; when the indoor air is rather dry and there is no ventilation, and the potting soil is too wet, it easily causes part of its root system to be damaged and rot, and the first sign shows on its leaves. When the leaves turn black, you must pay attention to this signal. First, we should mix thiophanate-methyl or mancozeb with water at a ratio of 1:1000 and water it with that. Use the same ratio to spray the leaves, at an interval of seven days, spraying about three times, and it can be effectively prevented and controlled. There is also one most important prerequisite: keep it well ventilated. No matter what plant you grow, ventilation is key. With a good air environment, any flower can be grown very well.

After the azalea finishes blooming, top-dress it promptly. It also needs pruning: cut off the spent flowers, the inner branches, the overly dense branches and the weak branches. After the new branches grow out, once they reach a certain size, pinch off their tips. This promotes the branches maturing; once the branches have matured, the new side buds that emerge during the flowering season will bloom. The more side buds there are, and provided there are enough nutrients, the more flowers it will produce. Be sure to pay attention to this point.

During the growing season, apply fertilizer to the azalea at least twice a month; in summer, shade it and keep it ventilated so it can get through the summer safely. When autumn comes, fertilize and water it normally. As winter approaches, switch to potassium dihydrogen phosphate and water it with that, until it produces flower buds, then stop. I guarantee your azalea will be grown very well and bloom profusely.

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