Gardenia leaves blacken and fall off, what to do, rules of care

Gardenia leaves blacken and fall off, what to do, rules of care

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Most flower growers will not hesitate to call the gardenia their favorite. In addition, it has useful and medicinal properties.

Gardenia is a rather capricious plant that is susceptible to various diseases and pests. The article will tell you about the gardenia indoor plant, the features of caring for it, why its leaves turn black and fall, and about the pests to which it is susceptible.


  1. Description
  2. Growing features
  3. Diseases
  4. Pests and ways to deal with them

Description of the plant

Gardenia is a heat-loving plant that grows in the south. Demanding to the conditions of their content. Growing this decorative indoor flower is very troublesome.

It is not uncommon for flower growers to take risks by buying it for their winter garden, but the time and effort spent on leaving is not without a reward. He thanks his owner for a long and abundant flowering.

The plant reacts very violently to any external stimuli and care features. The cause of the disease can be improper watering, poor lighting, low temperature in the room where the flower is located, low humidity and many other reasons.

In case of any diseases, the plant loses its decorative effect. His leaves turn yellow and dry, and in some cases even turn black, buds fall off.

Growing features

The plant is quite demanding on the conditions of detention. Novice gardeners may face difficulties caused by watering, lighting, fertilizing, and the composition of the soil for transplanting.

Gardenia does not tolerate at all when it is rearranged from one place to another, even the pot cannot be turned, because leaves and buds may begin to fall off.

Important!!! The plant must provide all the conditions necessary for a comfortable existence. If this is not done, quality development and long flowering can never be expected.


Let's look at the most common diseases that gardenia is susceptible to, find out when its leaves turn black and fall.

Wrong watering regime

Yellowing of leaves often occurs when the soil is too moist or dries out. It is necessary to water the flower as soon as the soil dries to a depth of 3-4 centimeters. It depends on the size of the container and the size of the plant. Complete drying of the soil cannot be expected.

Water quality also plays an important role. It can easily cause the foliage to dry out. Only filtered or well-separated water is suitable for the flower, which should always be warm. Do not use hard water.

Wrong soil mix

The flower prefers acidic soil, all others will provoke its diseases, because the roots in them will not be able to provide adequate nutrition for the plant.

A primer with an acidic pH can be obtained from a specialist store. It is called "Gardenia", and "Azalea" will do. You can acidify the substrate by adding pine needles to it.

To prevent alkalization of the soil, gardenia can be watered once a decade with water, which must be acidified by dissolving citric acid in 1 liter of water, taking it at the tip of a knife. It can be replaced with 2-3 drops of lemon juice.

You can also use oxalic acid by dissolving 1/3 teaspoon in 3 liters of water, it must be allowed to settle for several days for calcium salts to settle, they are harmful to many indoor flowers.


This disease can be identified by pale yellow leaves and bright streaks. It is associated with a lack of iron in the soil. This disease can be called chronic, and you need to fight it constantly.

This pathology develops due to alkalization of the soil. Its excellent prevention is watering with water with the addition of acid. When signs appear, the plant needs to be sprayed and watered with preparations with a high iron content, you can also improve the situation by burying a few nails in the pot.

Lack of lighting

Insufficient lighting often causes yellowing and drying of foliage. This happens evenly throughout the plant.


Like any indoor flower, gardenias need additional feeding during active growth and the onset of the flowering period. For her, you need to choose a balanced fertilizer, which contains a lot of magnesium and iron.

Spraying the plant with magnesium sulfate helps to revive the plant, accelerate and enhance its flowering. The spray solution is prepared at the rate of 2 grams of substance per 1 liter of water.

Draft and frostbite

Gardenia is a delicate and capricious plant. Temperature jumps in any direction cause blackening of the leaves. For this plant, the optimum temperature is 18-24 degrees Celsius.

Low air humidity

This plant came to our windowsills from the humid tropics. He loves high air humidity, otherwise he begins to shed the buds. To humidify the air around the gardenia, the pot with it must be placed in a tray with wet expanded clay. The leaves of the plant will collect moisture that comes from expanded clay.

You can resort to using a humidifier or sprays. Only when spraying, you can not get on the buds and flowers.

Change of place

It is strongly not recommended to rotate a flower with buds around its own axis. True, some species tolerate this normally, but others shed flowers and buds.

Untimely transplant

You can transplant this houseplant only after flowering. If you transplant a plant with buds, it will simply drop them.

Pests and ways to deal with them

In addition to diseases, gardenia is susceptible to attacks by various pests.

White aphid

A harmful insect that affects plant stems and foliage. It is often the reason why the buds fall off. You need to know that this insect reproduces very quickly. When it appears, you need to urgently take measures to destroy pests.

Spider mite

This is the main enemy of the tropical beauty. Together with him, the plant is also threatened by the scale insect.
To get rid of pests, it is necessary to periodically wipe the sheet plates with a napkin or cotton pad moistened with water.

This will help provide comfortable air humidity around the flower and detect the presence of pests and their larvae.

If shoots are found affected by spider mites, they must be removed immediately. This pest infects flowers when the humidity in the room where they are located is too low. For preventive purposes, they need to be sprayed regularly.

If a pest appears, it is required to treat the leaves with special insecticides. This will save your gardenia from spider mites for a long time.


To combat the scabbard, washing the leaves with a mild soapy solution is great. For greater effectiveness, after a week, you need to repeat the treatment. To avoid contamination of other plants, the affected ones must be isolated.

Let's watch a video on how to properly care for your gardenia:

Watch the video: 7 FATAL MISTAKES: Why Seeds Not Germinating or Sprouting? (August 2022).