When you want to start molting, the leaves will change, the old leaves will start to soften, without the vitality of previous growth, and in the later stage, they will gradually shrink, which means that the old leaves will fall down and start molting.
If under the condition of normal water application, there are transverse lines on the leaves, and longitudinal lines about to shed skin, there is a gap in the middle, which proves that there is life activity and shed skin soon.
You can also observe whether there are new leaves growing, so that you can judge whether it is molting. Look at the middle and lower part of the side to see whether there are new leaves protruding. You can also gently pinch both sides with your hands. If you feel something hard, it means that you are about to molt. If it is difficult to observe by naked eyes, you can turn off the light at night, and use flashlight to shine vertically from the top to see the blackening, it means that there are new leaves growing, and the old leaves are about to shed their skin.
Raw stone flowers usually begin to molt at the end of autumn, but it can not be judged by these methods. If the water is poured too much, the water content in the old leaves is more, so it is difficult to judge
