Water. The most common reason begonia leaves rot is too frequent watering. Begonias are succulent plants with stems that are mostly water, which makes them very sensitive to moisture and fungus. ... Eventually, those leaves rot and then fall off.
How do you treat begonia root rot?
There is no product for effectively treating begonia pythium rot. You should remove infected plants from the soil and dispose of them. However, you can make efforts to prevent stem and root rot of begonia when you are first putting in the plants.
How do you keep rotting begonias?
Begonia-Stem Rot
- Remove and destroy infected plants, increase ventilation, and avoid moistening leaves by watering.
- Sterilize soil or media before replanting. ...
- Do not overwater, and keep water-hose ends off the ground.
- Be careful not to bury begonia seed too deeply when planting.
- Do not overfertilize.
