If you have to paint a balcony / loggia or a personal plot, then we suggest you do it with petunia. A variety of varieties and colors allows you to create a colorful picture on the site and the balcony. The leaves of this flower are double and smooth, and the stems can be creeping, straight or flowing.
Like other plants, it happens that petunia is sometimes sick. The first signs of a flower disease are yellowing and dry leaves. Such a reaction may be the result of improper care, for example, due to the lack or excess of moisture or lack of trace elements. This article will discuss why petunia turns yellow and how to correct or prevent this phenomenon.
The first reason is a violation of watering rules.
Excess moisture leads to root rot on the plant. As a result, the stem becomes soft, and the petunia leaves turn yellow. If you do not take the necessary measures, the rot spread to the roots, so that the plant will die. Excess moisture leads to the development of fungal diseases.
To cure a plant, you must perform the following three points:
- Remove the affected shoots and treat the incision with fungicides.
- Do not let water stagnate.
- Loosen the soil.
Petunias tolerate drought easier than overflowing. A wilted plant after watering quickly acquires a healthy appearance. However, with 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
Most often, petunia leaves turn yellow due to powdery mildew. This is a type of fungal infection. The cause of the development of the disease is a sharp change in the level of temperature and humidity in the process of growing the plant.
A sign of powdery mildew - a whitish coating on the leaves. It is worth noting that the fight against the disease requires effort. If petunia is grown at home, the affected bushes should be transplanted into the pre-steamed soil. The next condition is strict adherence to humidity and temperature conditions.
Tip! Do not allow the stagnation of moisture in the pots with plants, as this will have a bad effect on 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 a spider mite. This pest is the most dangerous for cultivated plants.
The spider mite very quickly envelops the spider web not only with the leaves of the plant, but also with the stem, which interrupts access to nutrients. The cause of the mite is occasionally excessive dryness, most often high humidity.
If the petunia has ceased to bloom, the leaves have turned yellow, and a spider web has formed on the crown, then conduct a full inspection of the plant. It is possible to destroy spider mites by special means. In addition, you can engage in the fight against the pest and folk remedies. For example, you can prepare soapy water and spray it with a bush or make tincture of tobacco for subsequent spraying. Petunias planted in open ground are more susceptible to spider mites, so as a preventive measure they can be pollinated with crushed sulfur.
There are several chlorosis provocateurs. Among them:
- Use hard water.
- Violation of temperature.
- Lack of iron.
Watering is carried out after the top layer of soil dries out. So that the moisture in the ground does not stagnate, the soil must always remain loose. Best for irrigation is separated, soft water.
Violation of temperature
If the temperature regime is disturbed when growing petunia, then the leaves on it will first acquire a purple color, then turn yellow. To minimize this problem, it is necessary to spray a bush with liquid ammonia (half a bucket is 1 ml of alcohol) or ammonium fertilizer dissolved in water.
Petunias usually lack iron if they are grown in alkaline soil or in pots. To avoid chlorosis, plant petunias in acidic soil. Or, after planting, regularly acidify the soil.Important! Flowers react very quickly to iron deficiency. Therefore, this trace element should be included in the plant nutrition.
Peculiarities of care for petunia
If you want the bushes of the petunias you grow to hurt less, then water them once a day. The best time for watering - in the evening. In order to avoid spider mites, in hot weather the plant is best watered at twilight time of day. If small dots appear on the leaves, then this is a sure sign of excess moisture in the soil. In this case, watering the plants is better to suspend for several days. The soil must be loosened, so that the roots will receive more oxygen.
If a crust has formed on the top layer of soil, then it's time to resume watering the plant. In this case, it should be fed no more than 2 times a week. To activate the process of formation of new buds need to timely remove wilted flowers. If you notice that the root of a plant has rotted, then it should be treated as 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 tear the petals apart, which is why the bush acquires a sloppy appearance. He may even stop blooming. If rain is foreseen, the petunias must be brought into the shelter in advance.
If to speak as a whole, then petunia gets acclimatized well, therefore, it is quite profitable to grow it at home. This beautiful flowering plant can decorate your plot if you plant it along the fence. Near petunia, it takes root well young. Only here for the cultivation of this plant you need to pour gravel into the ground. Also young likes space.
So, petunia is an unpretentious, beautifully flowering plant that can be grown at home. The main thing is to properly care for him. The key to success is timely watering and stable temperature conditions in the process of growth and development.
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