What to do if the leaves of gardenia turn black

1. Reasons why leaves turn black

1. Too much watering

If the leaves of your gardenia turn black, it may be that you watered it too much, causing water to accumulate in the soil, preventing it from breathing smoothly, and the roots rot. Of course, you can't see the roots because they are in the soil, but you can see the leaves turning black.

2. Tree root injury

If its roots are eaten by some pests and diseases, it will be injured. If you water it too much at this time, the damage to the roots will be more serious, and there will be no way to transport sufficient nutrients to the leaves, and the leaves will turn black.

3. Temperature is too low

Another possibility is that the temperature is too low in winter. It is suitable for growing in an environment of sixteen to eighteen degrees Celsius. If the winter is too cold, it will stop growing and the leaves will turn black without a way to absorb nutrients.

4. Pests

Check the leaves to see if there are any insects or eggs on them. If there are, it is likely that aphids and scale insects have damaged the leaves. If there are no worms, it may be tea sooty disease.

2. How to deal with it

1. First of all, you should think about whether you have watered too much. Generally, this kind of flower should be watered only when there is no water around the soil, and the soil should be watered thoroughly each time. Of course, water should be controlled on rainy days.

2. Temperatures that are too low or too high are not good for its growth, so in the summer, place it in a well-ventilated and appropriately humid place, and use something to block the sun. In winter, keep it at a temperature not lower than zero degrees Celsius to let it hibernate. The temperature should not be too high, otherwise the flowers will not grow healthily next year.

3. If you find insects on the leaves but not in large numbers, you can prepare your own insecticide. If it is aphids, crush two garlic cloves and add about one liter of water and spray it on the tree. If it is a scale insect, you can remove it with alcohol or soapy water. If there are a lot of insects, buy special insecticides on the market.