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Why do geranium leaves turn yellow and how to prevent it?


It is no exaggeration to say that indoor plants and flowers can be seen in every house and in every apartment. Geranium also has its many fans.

Content:

  • Pelargonium care
  • Causes of yellowing of leaves and their elimination
  • Pelargonium diseases and their treatment

Pelargonium (also called home geranium) is an unpretentious plant, easily tolerates a lack of moisture, light-loving. It blooms from spring to late autumn. Excessive watering is harmful to her and can lead to yellowing of the leaves and their dropping. The soil for geranium is prepared from equal parts of turf, humus, sand and peat. Fertilizers should contain more potassium and phosphorus than nitrogen.

Pelargonium care

  • The lack of color in winter with healthy leaves can be explained by the increased temperature in the room.
  • If watery pads appear on the leaves, this is edema, a non-infectious disease. It manifests itself as a result of abundant watering.
  • At the other extreme, insufficient watering also leads to yellowing of the leaves. Watering should be increased.
  • Leaves fall, bare stems below indicate a lack of light. Geranium, as mentioned above, is a light-loving plant, and therefore, especially in the winter months, it should be placed on the sunny side.
  • A disease such as black leg is manifested by a darkening of the stem at the base. It is a contagious disease. A diseased plant must be destroyed. If you want to use the same soil, then it must be sterilized, and it is better to replace it.
  • Waterlogging can result in the appearance of gray mold on the leaves. This contagious disease is caused by the fungus Botrytis. For treatment, the affected leaves are removed, watering is reduced, and the plant is sprayed with a systemic fungicide.
  • Geranium can also be affected by pests: aphids, weevils, whiteflies. Bordeaux liquid must be used against them.

Causes of yellowing of leaves and their elimination

Pelargonium carries a positive energy. It pleases the eye with its rapid flowering, bright greenery. But now, it would seem, for no reason at all, the leaves began to turn yellow, and soon they fell off.

  1. The first reason is a very cramped pot. There is a widespread belief that geranium does not need large pots, but it can be skewed in the other direction. If the pot is too small, then the roots simply have no room for normal development. Transplant the geranium into a larger pot and the problem will go away.
  2. The second possible reason may be improper flower care in the autumn-winter period. Geranium does not tolerate drafts, at this time she especially does not like waterlogging. The most comfortable temperature is 10-12 degrees. Do not keep it near heating appliances. It is best to take it out to a glazed balcony on the sunny side and limit watering.
  3. The third reason is the lack or insufficient drainage in the pot. In this case, the lack of color is added to the yellowness of the leaves.
  4. Avoid too little watering. From a lack of moisture, the leaves will also turn yellow.
  5. Excess nitrogen in the soil also leads to yellowing. Apply potassium-phosphorus fertilizers especially in summer.

Pelargonium diseases and their treatment

If you find red-brown spots on the leaves, they dry out and fall off, then this is a fungus. It is urgent to remove diseased leaves, and treat the plant with Bordeaux liquid.

In the case when the leaves turn yellow and a midge has appeared, this definitely indicates waterlogged soil. It is necessary to reduce watering, and apply the drug Bazudin (Thunder-2) against the midge.

Fungal disease Rhizoctonia rot manifests itself by the appearance of depressed dark spots that spread along the stem to a height of 25 cm. Infection occurs through the soil, where the fungus is well preserved.

To prevent the disease, you must strictly adhere to the rules of cultivation.

If the disease has already manifested itself, it is necessary to stop watering and treat the plant with fungicides, for example, Rovral, Fundazol and others.

Another fungal disease is verticillary wilting. At the onset of the disease, some areas of the lower leaves turn yellow. Then the yellowness spreads to the entire leaf, it fades, but continues to hang on the stem, and the yellowness goes higher. The plant is infected through the soil, in which the fungus can persist for up to 15 years. To stop the spread of the disease, it is necessary to remove plant debris in time and add trichodermine or fungicide to the soil.

And finally, it must be said that if you take proper care of geraniums, take preventive measures in a timely manner, then it will thank you not only with exuberant flowering from the end of March to the beginning of December, but also with bright green leaves.

Not to mention the medicinal properties of the plant, which have been known for a long time. It is well known that geranium kills microbes, that is, it is a natural antiseptic. It is not for nothing that people love geraniums and breed it everywhere.


Watch the video: Fix Leggy Seedlings (January 2022).