What to do about root rot and yellow leaves in impatiens? There is still time to save it now

There are many causes of root rot in impatiens: if it is caused by overwatering, then do not water too much or too frequently. If it is caused by poor soil aeration, then switch to soil with good aeration and drainage. If it is caused by too high a fertilizer concentration, then control the amount properly, and do not make the fertilizer concentration too high either.
1. Overwatering
Cause: Overwatering affects root growth and also causes waterlogging; once waterlogging occurs, root rot is an unavoidable problem.
Solution: Watering must be moderate; do not water too much or too frequently. Especially during the dormant period of impatiens, be sure to control the amount of water and wait until the soil dries out before watering.
2. Poor soil aeration
Cause: Poor soil aeration prevents the roots from breathing, and since they cannot absorb nutrients, the roots will rot. If water accumulates in the potting soil and cannot drain out, it will also cause root rot.
Solution: Switch to soil with good aeration and drainage, which allows its root system to breathe normally and also lets accumulated water in the potting soil drain out faster.
3. High fertilizer concentration
Cause: When fertilizing impatiens, if the concentration is too high, it will burn the roots, the root system will turn black, and in severe cases it can even cause the death of the whole plant.
Solution: Fertilizing should be done in controlled amounts, and the fertilizer concentration should not be too high. You should apply thin fertilizer frequently. If too much fertilizer is applied, increase the amount of watering so that the excess fertilizer flows out as soon as possible. After discovering root rot, promptly cut off the rotting roots to prevent harm to more roots, then disinfect the roots and replant them.