New 880w LED Growing Quebec Blue

A couple of the plants aren't plumping up as expected and I am not sure the issue yet. The only two things I can think of are the co2 or bulking powder. The co2 is just yeast and sugar in a pop bottle hanging. The bulking powder I am using as directed but my gut says the plants aren't liking it. I sure hope it didn't hermie. I removed the co2 and stopped using the bulking powder. Hope to see some improvement.