Plant disease: why do begonia leaves turn yellow and dry?

Plant disease: why do begonia leaves turn yellow and dry?

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Begonia is a very popular and attractive flower that can be grown indoors and outdoors during the warmer months.

This plant combines the amazing beauty of leaves, flowers and the shape of the bush itself. A bright, colorful plant with many varieties and species.

But sometimes it can get sick, so it is necessary to understand why the leaves of begonia turn yellow and what should be done for prevention?

Features of the flower of the genus Begoniev

The Begoniev family can be divided into two large types:

  1. decorative deciduous;
  2. decorative blooming.

The first subspecies has large leaves of various shapes. Their inflorescences are small, unattractive. The appearance of deciduous begonias resembles tropical plants, all kinds of ficuses.

The second subspecies attracts attention with multicolored inflorescences. Some varieties bloom for a year.

Often found in begonias, yellow foliage, the edges dry, and then the entire leaf dies off (about why begonias can dry out the leaves at the edges and flowers, read here). In order to help a diseased plant, at the beginning it is necessary to understand the reasons, and there may be several of them, for example, improper care or lack of nutrients, as well as illiterate maintenance in winter or diseases and insect pests.

Causes of plant disease

  • Change of residence.
  • The plant was in a draft for a long time.
  • Sharp changes in temperature and humidity conditions in the room.
  • Immediately transplanted after purchase, the plant thus endured stress.
  • Unsuitable flowerpot.
  • Used during planting inappropriate soil, it can be sour or heavy.
  • Liquid spilled onto foliage.
  • Also, the cause can be pests such as aphids, whiteflies, spider mites.
  • The plant can be sore due to fungal or bacterial infection. In which watery brown spots, or white bloom and yellow spots appear on the leaves of the plant.

Care rules

  1. If the flower pot is moved from the room to the balcony, after which the leaves of the plant dry up and turn yellow. This is directly related to the changeable temperature, this type of plant has a negative attitude to such changes. To solve this problem, return the flowerpot to its original place.
  2. In begonia, the edges of the leaves dry out, this is possible due to watering with cold tap water. Begonia should be watered with settled or filtered water. If possible, acidified, with the addition of lemon juice. The water must be warm or at room temperature.
  3. The leaves of the plant turn pale, the tips turn yellow, and the shoots are pulled out. This is the first sign of a lack of sunlight. It is enough to move the flower to a brighter place in the house or add artificial light. Begonias prefer intense lighting. You need to choose windows on the south side.

    It is important to remember that the light should be diffused, begonia does not tolerate direct excess light.

  4. With an excess of moisture in begonias, foliage also begins to turn yellow and curl. Keep your begonias hydrated regularly and in moderation. You need to water the soil no more than 2 times a week.
  5. In the case of parasites, it is best to resort to the use of preparations containing insecticides. In case of fungal and bacterial diseases of the plant, the following measures should be taken: the soil is treated with disinfectants, and as a preventive measure, it is enough to treat the flower with a mixture of medical chlorhexidine, this is in case of bacterial infection, preparations containing fungicides can easily cope with fungal infections.


  • The optimal temperature regime in summer should be at + 22-24 ° С, in winter not lower than + 18 ° С.
  • Maintain humidity within 50-70%.
  • Begonias require intense, diffused sunlight.
  • Additional lighting is required in winter.
  • The plant should be watered, no more than 2 times a week during the normal period. In the heat - every day. In winter - once every 10 days.
  • Be sure to feed it with complex mineral fertilizers, about once every two weeks. You can feed with organic fertilizers twice a year.

If the soil is depleted, the plant begins to "starve" and, accordingly, wither (about why begonia can dry out and wither and what to do about it, written in a separate article). In decorative flowering begonias, buds become smaller, the duration of flowering decreases, and the foliage turns yellow. These varieties are best fed with mineral fertilizers, which are dominated by potassium and phosphorus. But nitrogen should be as little as possible.

It is important to feed the plants throughout the flowering period. Ornamental deciduous begonias should be fed from spring to autumn. It is advised to apply fertilizers from the beginning of the active growth phase; for these plants, on the contrary, nitrogen should be the main mineral in the feeding. It stimulates growth and makes the color of the leaves more intense and juicy. The main thing is not to overfeed the plant, otherwise the result will be the opposite of the desired one.

Be sure to be attentive to your plant. Tear off dried leaves and flowers in time, loosen the soil, remove dust from the plant and inspect for pests. Begonia will delight you for more than one year with its bright colors, the main thing is to properly care for it!

Watch the video: 8 Reasons why Plant Leaves Turn Yellow (July 2022).


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