Tips and tricks

Why petunia leaves turn yellow


If you have to paint a balcony / loggia or a personal plot, then we suggest that you do it with the help of a petunia. A variety of varieties and colors allows you to create a colorful picture on the site and on the balcony. The leaves of this flower are double and smooth, and the stems can be creeping, straight or falling.

Like other plants, it happens that petunia sometimes gets sick. The first signs of flower disease are yellowing and dryness of the leaves. Such a reaction can be the result of improper care, for example, due to a lack or excess of moisture or a lack of micronutrients. This article will discuss why petunia turns yellow and how to fix or prevent this phenomenon.

The first reason is violation of watering rules

Excess moisture leads to the appearance of root rot on the plant. As a result, the stem becomes soft, and the leaves of the petunia turn yellow. If the necessary measures are not taken, then the rot will spread to the roots, as a result of which the plant will die. Excess moisture leads to the development of fungal diseases.

To cure a plant, you need to complete the following three points:

  1. Remove the affected shoots, and treat the incision sites with fungicides.
  2. Avoid stagnant water.
  3. Loosen the soil.

Petunias tolerate drought more easily than overflow. After watering, a wilted plant quickly acquires a healthy appearance. However, with a chronic lack of moisture, petunias weaken, as they lose their immunity. As a result, pests settle on the leaves, diseases develop.

Powdery mildew and spider mite infestation

Most often, petunia leaves turn yellow due to the defeat of powdery mildew. This is a type of fungal infection. The reason for the development of the disease is a sharp change in the level of temperature and humidity during the process of growing a plant.

A sign of powdery mildew is a whitish bloom on the leaves. It is worth noting that fighting the disease takes effort. If the petunia is grown at home, then the affected bushes should be transplanted into pre-steamed soil. The next condition is strict adherence to humidity and temperature conditions.

Advice! Avoid stagnant moisture in pots with plants, as this will adversely affect the roots, as a result of which fungal diseases will develop.

Excess nitrogen is also inappropriate in the soil in which petunia is grown. Anyway, yellow leaves always have a cause. In addition to powdery mildew, the flower can infect spider mites. This pest is the most dangerous for cultivated plants.

The spider mite very quickly envelops the cobweb not only the leaves of the plant, but also the stem, which cuts off access to nutrients to them. The reason for the appearance of a tick is occasionally excessive dryness, most often high humidity.

If the petunia has stopped blooming, the leaves have turned yellow, and a cobweb has formed on the crown, then conduct a complete inspection of the plant. You can destroy a spider mite using special means. In addition, you can involve in pest control and folk remedies. For example, you can prepare soapy water and spray it on a bush, or make a tincture of tobacco for subsequent spraying. Petunias planted in the open field are more susceptible to spider mites, therefore, as a preventive measure, they can be pollinated with crushed sulfur.

Chlorous yellowing

There are several chlorosis provocateurs. Among them:

  • Use of hard water.
  • Violation of the temperature regime.
  • Lack of iron.

Hard water

Watering is carried out after the topsoil dries out. So that moisture in the ground does not stagnate, the soil must always remain loose. Standing, soft water is best suited for irrigation.

Temperature violation

If the temperature regime is violated when growing petunia, then the leaves on it will first acquire a purple color, after which they will turn yellow. To minimize this problem, you need to spray the bush with ammonia dissolved in water (1 ml of alcohol goes for half a bucket) or ammonium fertilizer.

Lack of iron

Petunias usually lack iron if they are grown in alkaline soil or in pots. Plant petunias in acidic soil to avoid chlorosis. Or acidify the soil regularly after planting.

Important! Flowers react very quickly to iron deficiency. Therefore, this trace element should be included in plant nutrition.

Features of petunia care

If you want your petunia bushes to hurt less, water them once a day. The best time to water is in the late afternoon. In order to avoid the appearance of a spider mite, in hot weather, it is better to water the plant at twilight. If small dots appear on the leaves, then this is a sure sign of excess moisture in the soil. In this case, it is better to suspend watering the plant for several days. The soil needs to be loosened, so that the roots will receive more oxygen.

If a crust has formed on the top layer of the soil, then it's time to resume watering the plant. At the same time, you need to feed him no more than 2 times a week. To activate the process of the formation of new buds, it is necessary to remove wilted flowers in a timely manner. If you notice that the root of the plant has rotted, then you should treat it with a fungicide as soon as possible. In this case, the affected part of the stem must be removed.

Important! Decorative varieties of petunias are afraid of torrential rains.

This is due to the fact that the drops break the petals into pieces, which is why the bush takes on a sloppy appearance. It may even stop blooming. If rain is foreseen, then the petunias must be brought into the shelter in advance.

Generally speaking, petunia takes root well, so it is quite profitable to grow it at home. This beautiful flowering plant can beautify your site if you plant it along the fence. Young people take root well near the petunia. But to grow this plant, you need to pour gravel into the ground. Also young people love space.

So, petunia is an unpretentious, beautifully flowering plant that can be grown at home. The main thing is to take proper care of him. The key to success is timely watering and a stable temperature regime in the process of growth and development.

Additionally, you can view the video on our website:


Watch the video: Why Are My Petunias Turning Yellow? (May 2021).