My beautiful petunias seem to have grown small stem in the end and no blooms.
Dear Gardener: It sounds like your Petunia are resting after blooming well for a while. I would cut them back a little to be sure all the seed heads are gone and then fertilize lightly with a fertilizer with higher middle and last numbers (like 5-10-10). Some Petunias "rebloom" better than others. One that has a great reputation for blooming all summer is the "Wave" series