Why do leaves turn yellow petunias and how to solve the problem

Petunia - summer flower, very favorite growers. It is planted on the plot; hang in pots on the front porch, terrace; put in a pot on the balcony, loggia. Sometimes it happens with petunias such trouble as yellowing of the upper and lower leaves. Why it happens and how to fight it, we shall understand together.

Causes yellowing

Leaf yellowing due to the following reasons:

1. Lack of nutrients

Because of this, usually yellow upper leaves. To flower showed itself in all its glory, it must be constantly fed with chemical fertilizers with a minimum content of nitrogen.

2. Lack of light

Petunia will develop poorly with a lack of light, so it should not be placed under the canopy of other flowers or shrubs.

3. Watering hard water

When irrigation water or fertilizer with a high content of calcium petunia leaves exposed chlorosis.

In order to reduce its concentration in the soil feed the plants with iron compounds. Water for irrigation use soft, well-defended.

4. Infected plants spider mites

Insect first cobwebs enveloping leaves, which after some time begin to turn yellow and then dry up. This may occur because of too dry air.

To get rid of the tick petunia sprayed with a soap solution, in severe cases - a solution of the insecticide.

5. defeat aphids

Insects settle on the leaf, starting to pull out of it juice. As a result, leaf yellowing and drying.

To get rid of this trouble can be purchased in a drugstore nicotine-sulfate, which was added to the soapy water (1 g in 1 liter water). Petunia is sprayed with the solution in a day. Suffice it to 3-4 procedures.

6. Soil contamination by a fungus, most often - powdery mildew

This is due to copious wetting plants - especially at low air temperatures.

Petunia to be transplanted into a new soil, pre-treating an antifungal drug.

right care

It consists in the following:

· Watering petunias produced soft water, preferably in the evening;

· Before the next watering should have time to form a crust;

· Withered buds, as well as the affected leaves are regularly removed;

· If it started to rain, a plant with an open-air entered into the house or anything served;

· Several times a season to feed the petunia.

Petunias need to pay at least a few minutes a day, and if it does not upset his master yellowing of leaves or some other unpleasant changes.