Oh my.... What have you been doing to her? Or not doing? We need more information. Whats your setup, whats your soil/soiless? Ph? Nutes?more info please
Soils have anything from 1-3 months worth of mutes. I personally don't know about fox farm soil I think it's 2months worth from reading. Get this checked. I don't feed till starts to show dificiency.
Without knowing anything more, just giving a look over a picture I would have to agree with lime73 here. I have never really done anything with extra fertilizer...always ensured the soil has the right balance from the start and never really used anything additional.