First, the normally growing soil needs to be moist enough and needs to be replenished in time. At the same time, more watering can make plants grow faster, so the yield will naturally increase a lot. Drought resistance is very low, try to avoid drying.
Secondly, the normal growth of water spinach needs to keep enough light, so that photosynthesis can be carried out and the branches and leaves will be greener. If the light is not enough, the branches and leaves will become very short and the color will not reach the expected effect.