When changing the pot, you must change the soil. The purpose of changing the pot is to change the soil without nutrition and the flower pot with suitable size. Many flower friends in the basin, just shake off the old soil directly on the basin, this is the wrong way to plant roots should be cleared of soil, withered, rotten roots cut off and then on the basin.
In addition, if the basin needs to be replaced due to the damage of diseases and insect pests, the soil can not be replaced. If you still use the old soil, the germs in the soil still exist, and the plants will suffer from secondary infection.
Generally, it is better to use wet soil. When changing pots, the roots of the plants should be trimmed and dried after being sterilized with medicine. In this case, wet soil can be used. Of course, the soil should not be too wet, and proper water spraying is the best in a slightly wet state. However, the use of wet soil or dry soil and the climate is also related, if the region itself is very hot and humid, the use of wet soil is prone to black rot.
