Why Are My Dragon Wing Begonia Leaves Curling. Insufficient light causes the plant to become leggy and prevents flowering. Begonias do not like soggy soil or to sit in water so be sure to discard any water that has accumulated in the saucer after watering.
These plants build bigger better begonia baskets and grow great gardens. Powdery mildews are caused by fungi that live on the surface cells of plants. Too much fertilizer is another source of mineral buildup.
Each of these issues can cause begonia leaf curl.
Insufficient light causes the plant to become leggy and prevents flowering. Proper light helps the leaves and flowers develop a more intense color. Full sun will turn the edges of the dark glossy leaves to red and make them curl but it will not be harmful to the plants. Mildew is not the problem with Begonia coccinea that it can be with other begonias but fungal disorders can certainly set in if plants are too crowded watered from overhead or have poor air circulation.
