I apologize but have had no access to a computer since Sunday. I am in KY and tomorrow leave for NC for a large orchid expo. I should have access to a computer at the hotel but when I can do so is questionable. I have a lot of things to keep me busy while at the expo.
@courtK04, can you post some pictures? I am a bit confused with your terns "sterile" and "fertile" fronds.
I can tell you this. I grow none of my staghorn ferns in baskets or in moss. That doesn't mean this growing method can't or shouldn't be done, I just don't do it. These are epiphytic "air-plants" and I want mine to grow more as they do in nature. Once the plants' fertile fronds reach 6-8" (whether there is a basal frond or not), I try to mount those plants.
In my experience, if my staghorns are getting bright light, enough moisture to keep the fronds from shriveling (not a lot of moisture given in the winter months if they are potted), low temperature at or above 55 F, and low-dose fertilizer (1/4 strength) when watering, they never stop growing.
If you could post some pictures, that would be most helpful.