First of all, take it out of the pot soil, clean the soil, wash it with water, then cut off the rotten root system with scissors until the healthy root is exposed, then disinfect the root, prepare new soil and flowerpot, and then plant it again after it is dried.
Reason: do not over water Petunia, once the soil is too wet or there is water, it will not be conducive to the growth of the root, but also easily lead to rotten roots, its root regeneration ability is very poor, rotten roots are generally difficult to save.
Solution: the amount of water must be well controlled, one-time watering can be, to wait for the soil to dry, then watering, watering can not be too much, especially in summer, but also to reduce watering, in addition, the drainage of the soil is also good, so as to drain the excess water, it will grow more healthy.
Cause: Petunia is most afraid of the rainy season. If it is still cultured outdoors in rainy season, or not covered by rain, it will rot its roots and even lead to plant death.
Solution: in rainy season, keep it away from rain in time, put it indoors or in a place where it won't rain. If it's not covered in time, take proper drainage measures in time, and don't let the water in the basin remain for a long time.
