Beginner Gardening: Petunias 911 *help please!*, 3 by WAK13

WAK13 wrote:
Bought these petunias Memorial Day weekend they are in a hanging basket looked awesome till one week ago. Soil is damp never dry has weep hole on the bottom of the planter. Bought two and one is showing early sign of the same thing haven't done a soil test but they are planted in potting soil fertilized with mirical grow 24-8-16 about a month ago then two days ago. Not sure how to approach them could use help thanks