If you find that there are black spots on the leaves, maybe you didn't pay attention when you watered them, and you accidentally sprinkled the water on the leaves, so the water will remain on the leaves. When the sun is shining, it will easily form sunburn, so that's how the black spots come. Then we must remember that the next time we watered, we must Avoid leaves. If there is too much water, it will make the basin soil too wet, and it will not be well absorbed. At this time, there is water in the basin, which will rot the root, and it will easily grow black spots. Then we should learn to control the amount of water, not enough water, but also put it in a more ventilated place, keep the basin a little dry.
Sometimes, if there is a black spot, when we are making sure there are no other problems, then don't worry about it. It may be carrying out regular metabolism, which will also produce a black spot. Therefore, we must take a good look at it carefully. We can't deal with it at will for any reason. We should find the right reasons to solve them one by one. Normally, plants also have a period of metabolism.
When there is a black spot, we need to observe carefully to see if there is any disease or insect on the leaf or root. If there is any, it may be the reason for the black spot. The disease or insect absorbs its nutrition, and also damages its root and leaf, so it can't grow normally. At this time, the black spot will grow easily. At this time, we will take certain measures to eliminate all these insects with some drugs and ensure that they will not be harmed any more, so that they will not grow black spots easily