Dragon Wing Begonia Yellow Leaves. Curling of begonia leaves are often among the first noticeable symptoms of this issue as well. 36 Votes The leaves on an Angel wing begonia usually turn yellow and fall off when the plant is over-watered.
Begonias are succulent plants with stems that are mostly water which makes them very sensitive to moisture and fungus. They will send out new leaves when conditions are right. You can expect sprays of white pink or red flowers in late spring and summer.
Begonias are succulent plants with stems that are mostly water which makes them very sensitive to moisture and fungus.
The most common reason begonia leaves rot is too frequent watering. To help prevent this disease in begonias remove any signs of infected plant material and make certain to avoid wetting the leaves while watering. The yellow leaves certainly can mean too much water or dried yellow can mean not enough. That is probably Medora and a common name is trout leaf like GH said.

