Annuals: Anyone else having trouble with super bells sweet tart?, 2 by cindyeo

cindyeo wrote:
I bought 2 pink Proven Winner superbells, Sweet Tart, this year for my windowbox, along with their supertunias, limoncello. Petunias are flowering great, but the Calibrochia have totally stopped flowering, and they are the only shot of pink that I have in this windowbox. It's only July 11, they get sun from 9 to 3, and I did put some Flowertone in a week or so ago. Possibly too much water, I may cut back. Anyone else? These photos are today, the last one was July 1 when I had only a couple pink flowers left.