Viola tricolor likes relatively fertile soil, because its ability to bear barren is not good, and the soil should be rich in organic matter. Moreover, the drainage performance of the soil should be good enough to help the evaporation of water in the soil. The acidity and alkalinity of soil also need to be paid attention to. Neutral soil should be selected as much as possible. In addition, the water content in the soil should not be too much. In the maintenance period, the soil should be turned over and the drainage should be paid attention to.
