The main reason why the lotus can only be raised in mud:

During flower bud differentiation of flowers, the root should be spent in an environment without light. At this time, avoid the contact between the root and light. If you can use a glass bottle as a flower pot for cultivating bowl lotus, ensure that the soil can wrap all the roots of bowl lotus without any exposure

Extended knowledge of raising bowl lotus with mud only:

Many friends think that when the cement is mixed, the water is always dirty, which seriously affects the mood of watching the bowl lotus, so they think: can't you cultivate the bowl lotus directly with water? If the polluted water affects the viewing, it can be cultivated directly with soil. However, when planting bowl lotus, the soil should be soaked in water for a period of time. The longer the time, the better. Then take it out and plant bowl lotus, but every time you water in the future, pour the water slowly along the edge of the basin. Don't rush

In fact, there is a small trick. You can sprinkle a layer of sand on the surface of the mud, and then pour water on it. In this way, you can not only keep the water clean, but also realize the effect of cultivating bowl lotus in water. The sand can suppress the dirt of the following mud, and the sand can also sink steadily on the surface of the mud