Why are the tips of gardenia leaves black and dry?

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1. Insufficient maintenance

2. Flower soil is acidic

3. The soil is highly alkaline

4. Insect pests occur

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There are many reasons for the black tips of gardenia leaves. If it is due to poor maintenance, it needs to be moved to a ventilated place in time and drainage should be strengthened; if it is because too much ferrous sulfate is sprayed, it needs to be cleaned or repotted in time; if it is because the soil is highly alkaline, ferrous sulfate needs to be used to improve the pH. ; If it is due to root-knot nematodes, the root nodules need to be cut off and pesticides sprayed in time.

1. Insufficient maintenance

1. Poor maintenance

Cause: Generally caused by poor ventilation or excessive watering. This situation will improve after improving environmental issues and maintenance methods.

Solution: Move the plant to a well-ventilated place, reduce watering, and water thoroughly after the soil is dry.

2. The flower soil is too acidic

Reason: Too much ferrous sulfate is used, causing the pot soil to be highly acidic. This in turn affects the growth of gardenias, causing the leaf tips to turn black.

Solution: If the black leaves are not If there is too much, just rinse the pot soil with clean water. If there are many black leaves, you should change the pot and soil in time, and check the roots for burns. At the same time, reduce the number of sprays of ferrous sulfate, usually once every one to two months.

3. The soil is highly alkaline

Reason: Gardenia likes acidic soil, and high alkali content in the soil will cause the leaves to turn black.

Solution: Add a certain amount of ferrous sulfate solution to the potting soil. You can mix it with water and spray it on the leaves once a month. Too often will be detrimental to growth.

4. Insect damage

Cause: Root-knot nematode is one of the common pests of gardenias, and because it is mostly found in the roots, it is difficult to find.

Solution: Check the roots to see if there are root nodules. If there are any, cut them off and use pesticides to kill insects.

2. Flower soil is acidic

3. The soil is highly alkaline

4. Insect pests occur

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