The edge of Gardenia jasminoides leaves blackened and withered.

Gardenia is a fragrant light ornamental flower, there are many varieties, there are large shrubs, but also small shrubs, suitable for potted plants. In any case, it is easy to have some problems after planting, especially the growth space of potted plants is limited and it is easy to grow badly. Sometimes it is common that the leaves turn black, the edges and even wither, and I don't know the reason, so let's mainly introduce what to do in this situation today.

1. Occurrence of diseases

The main cause of blackening of plant leaves is coal fouling disease, this disease can infect a lot of plants, gardenia is the same, infected leaves will be covered with a layer of black substance. It is also possible that gardenia anthracnose, brown spots appear after leaf infection, gradually withered and blackened, give birth to a small black spot after a small piece of black. Bordeaux liquid protective agent was used in advance to prevent the disease, the disease was irrigated with 40 times ferrous sulfate solution, and then 0.2% ferrous sulfate was used to spray leaves.

2. Insect damage

Some piercing pests suck the sap of the leaves, and then the leaves will turn yellow and black and then dry up, so to deal with these piercing pests, the best way to deal with these piercing pests is to sweep away the larvae, collect them in containers, poison them to death, apply pesticides on diseased branches, cut off diseased branches seriously, and spray chemicals.

3. High temperature and drought

If the temperature is very high and the weather is unusually dry, the leaves will lose water and gradually dry up, usually drying up from the edge of the leaves. During drought, the soil roots are unable to absorb water, and the plants lose water, which is first shown on the leaves. With high temperature and drought, sometimes spiders gradually dry to death. If it is a potted plant can be moved to indoor watering, open field should be watered in the evening, always adhere to watering.

4. Excessive humidity

Generally too much watering, or heavy rain, continuous rain, these will cause too much humidity, the soil moisture can not go out, the whole environment humidity is very high. Water deposition, the root system is easy to rot, rot, and then can not absorb nutrients, easily infected with bacteria, and after the leaves blackened and withered. Watering depends on the situation, dredging in the rainy season.

Gardenia growth environment changes, not suitable, will be shown in the leaves, blackening, withering and so on. Therefore, we should pay attention to improving the environment, regulate growth in time, and focus on prevention and control if diseases and insect pests occur, so that the situation will improve.