It could simply be the variety combined with the age of the plant. Typically, the hotter the pods, the longer a pepper plant takes from germination to fruiting. So if you are growing superhots, for example, and these are first-year plants, they may simply not be ready yet. I am in northern Ohio, and none of my very hot first-year plants have begun to bud yet. (However, my overwinters of the same varieties already have pods on them.) If they're first-year plants, and especially if they're very hot varieties, just be a bit more patient. If they're not so hot, though, such as jalapenos, then let us know and we'll see if we can help diagnose the problem, as jalapenos should definitely be flowering by now.