What to do about Ruellia plants blooms suddenly pale
It is summer Wittmann (outside of Phoenix) Temperatures between 108- 115 degrees Not sure if Im overwatering due to temp The small size and almost white (instead of deep purple) makes me think it is the soil Im not knowledgeable about soil or fertilizers
Certified GKH Gardening Expert
I would need a photo to be able to see what is going on. I would say that overwatering is a possibility. These are drought tolerant, but can easily get a disease when overwatered. They can also be affected by getting water on the leaves and flowers in bright light, as well as infections from the leaves remaining wet.
In the meantime, this article will help: https://www.gardeningknowhow.com/ornamental/flowers/petunia/petunia-care.htm