What to do if the leaves of Poinsettia turn black

The leaves of Poinsettia turn black, which means it is past its viewing period.

The red leaves of poinsettia are not real leaves, but highly ornamental bracts. If the flowering period has reached the late stage, it means that its ornamental period is about to pass. At this time, the leaves will turn black, which is relatively normal.

At this time, you can prune the poinsettia, cut off the upper branches, and only keep the base stem segment of about 5 cm. You also need to keep 3-5 buds so that they can sprout again. In order to make the poinsettia enjoyable again, we need to strengthen the management of water and fertilizer, place the poinsettia in a place with sufficient light, and keep the temperature within the range and not too high. Prune it again in autumn to keep it in good shape. Maintain suitable temperature and light in autumn, and turn the flowerpot frequently, then you can see the red bracts of the poinsettia again.

The leaves of poinsettia turn black, indicating black spot disease

Black spot disease mainly harms the bracts of poinsettia. When black spot disease occurs in poinsettia, black spots or mildew spots will grow on the bracts. The range of the spots is sometimes very large, causing the leaves of the poinsettia to turn black.

If black spot disease is confirmed, timely measures need to be taken. The main reason why poinsettia becomes sick is that the pathogen is spread by wind, rain, etc., which can easily cause the disease in infected poinsettia plants due to poor ventilation, improper light, and improper water and fertilizer.

To prevent and control black spot disease, it is necessary to pay attention to strengthening management, promptly clean up dead branches and diseased leaves in the autumn and winter, pay attention to shaping, strengthen ventilation and light transmission, and reduce the chance of black spot disease in poinsettia. When the disease occurs, it is mainly treated by spraying pesticides in time.