I have an orange wax begonia that I just planted in full sun. Had lots of rain in the morning and full sun in the afternoon. I noticed when I returned home at night that some of the leaves have white spots on them and the plant looks like it is dying. Please help! The plant is beautiful and I would love to save it. I have had the plant for about a month. First I had it in a pot in mostly shade with some sun. I decided to move it to the front of the house with full sun and repotted it into a larger pot.
Orange Wax Begonia
Certified GKH Gardening Expert
It sounds like your wax begonia is afflicted with 'powdery mildew'. You can read about powdery mildew and courses of treatment at the following link:
For more information on the care of begonias, please visit the following link: