What to do when the leaves of the ZZ plant turn black? The causes and solutions are all here

The ZZ plant (Zamioculcas zamiifolia) is named for its leaves, which closely resemble ancient copper coins. It is a wonderful foliage plant, good-looking and cute, and is deeply loved by many growers. The ZZ plant is highly adaptable and generally able to quickly adjust to all kinds of new environments. There is nothing particularly special about its day-to-day care, and it is basically very similar to other plants. However, many flower-growing friends have reported that the leaves of the plants they grow turn black and they do not know what to do. So below, Shuai Shuai will talk about the causes of blackened ZZ plant leaves and the solutions!

I. Causes of blackened ZZ plant leaves

1. Cold damage: The incubation period of cold damage in the ZZ plant is generally quite long, and it takes about half a month for the characteristics to show, which is when people discover it. If only a relatively small number of leaves are affected by the cold damage, they can be cut off directly.

2. Brown spot disease: The most common disease of the ZZ plant is brown spot disease. The specific symptoms are that many round or oval spots appear on the leaves, appearing purplish-brown, and then slowly, slowly they become blacker and blacker until they finally wither and fall off. Brown spot disease is mainly spread by dead leaves or soil with the help of wind and rain, and is most easily triggered in the high-temperature, high-humidity environment of summer, which is its peak period.

3. Improper watering and lighting: Everyone knows that watering too much, or watering too quickly, can cause water to accumulate at the bottom of the pot. So when we water, we should water slowly and give the water time to penetrate downward. Otherwise, the plant's roots will rot directly, it will be unable to absorb nutrients, and the leaves will turn black. Nor can it be grown under strong light for a long time, as this will scorch the petals. But at the same time, we must also ensure it gets enough light time so that photosynthesis proceeds smoothly.

4. Insufficient fertilizer: If not enough fertilizer is applied, the plant will lack nutrients, the fertility in the soil will be exhausted, and the leaves will be unable to absorb sufficient nutrients. Their immunity will decline, making them very susceptible to brown spot disease and causing the leaves to turn black and dry up.

II. Solutions for blackened ZZ plant leaves

1. Brown spot disease

If our leaves are infected with brown spot disease, we can appropriately spray a 600-800 times dilution of 50% carbendazim wettable powder, 0.5%-10% Bordeaux mixture, or a 900 times dilution of 25% chlorothalonil wettable powder, spraying two or three times every other week. In addition, when dry, irrigate with a carbendazim solution.

2. Watering and lighting problems

In the dry, high-temperature season of summer, wait until it is dry before watering, water only after it has dried completely, and follow the principle of watering thoroughly once you water. In winter, watering once a month is enough. In addition, move the plant to a place with sufficient light, cut off the blackened leaves, and then spray with a chlorothalonil solution.

The above are the causes and solutions for blackened ZZ plant leaves. A good-looking and cute foliage plant like the ZZ plant can be grown in several pots at home. It can serve as a potted plant and also as an air purifier, so why not? Moreover, this plant does not need to be watched over all the time and does not consume much time. If you like it, go ahead and grow a pot and give it a try!