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Why do the leaves of a rose turn yellow – looking for reasons

yellow leaves by the roseA beautiful well-kept rose garden in the front garden is the pride of any housewife. Due to the duration and frequency of flowering, roses have become quite popular decorative crops. However, even the most resistant varieties can develop diseases as a result of weather conditions, pests and growing errors. And in some situations, you can observe how the leaves of a rose turn yellow – what to do in such cases?

We select fertilizers

A change in the color of the leaf mass in a plant can occur due to a lack or an excess of fertilizers. Since at different periods of development, the culture needs various nutrients and the lack of even any one element becomes the reason why the leaves of the rose turn yellow.

The main trace elements that have a strong influence on the development of the rose bush:

  • Nitrogen. This type of fertilizer is necessary for increased growth and accumulation of vegetative mass. Its lack makes the leaves first light green, after which the rose turns yellow and the premature fall of its leaf mass begins. At the same time, the formation of short thin shoots, slow growth and weak flowering are observed. At the same time, the decorative effect of the bush is sharply reduced. An excess of this trace element is characterized by rapid vegetation and a decrease in winter hardiness..
  • Phosphorus. With its insufficient amount, the development of both the ground part and the root part is delayed in the bush. Therefore, the leaves of the rose turn yellow and subsequently fall off. With an excess of phosphorus, the rose begins to grow very stiff, which leads to its premature aging..
  • Potassium. For the full formation of buds and shoots, the flower needs potassium and phosphorus. The maximum consumption of these microelements is achieved during flowering and outflow into new shoots. Potassium starvation contributes to the appearance of yellow spots and browning on the leaves. As a result, they die off, and the development of the bush slows down sharply..
  • Iron deficiency can lead to chlorosis. The symptom of this disease is the appearance of yellow spots on the leaf, after which all the leaves of the rose turn yellow and fall off..

Timely application of complex fertilizers and preventive spraying with biostimulants such as Epin or Zircon will help to avoid such problems..

Diseases and pests from which rose leaves turn yellow

Also, the reason why the leaves of a garden rose turn yellow are various diseases and pests, both explicit and latent. Very often on its leaves you can find fungal diseases that arise on a healthy bush and form a mycelium there. Experience has shown that viruses are usually transmitted from new plants or through contaminated garden tools..

Roses turn yellow with the following infectious diseases:

  • Black spot.
  • Mosaic.
  • Powdery mildew, common or false.
  • Rust.

black spot and rust

To avoid the appearance of infectious diseases, it is recommended to carry out preventive measures in the spring, which should include the treatment of bushes and soil around them with special means.

Newly purchased plants should be soaked in a fungicidal solution before planting, which will prevent the development of an infectious disease, if any..

larvaeAlso, the leaves of a rose may turn yellow if it is attacked by pests:

  • Spider mite. It appears as small white grains on the inside of the leaf.
  • Rose leafhopper. This insect is easy to spot from the underside of the leaf, as it is yellow in color and up to 4 mm in size..
  • May beetle larvae. In this case, the rose not only turns yellow, but also fades rapidly..

Spraying with special insecticides will help get rid of fungal diseases and pests..

Video: rust is the reason for the yellowness of rose leaves

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