What if any ferts are you using now ? I use Schultz Plant food which is 10-15-10 when I can't afford some FoxFarm Grow Big liquid plant food and I don't have any containers left but I think it was something 12-7-7 . I give no ferts the first two weeks and the next 2-3 weeks 1/2 strength and than one more at full strength than I start the flowering process and move onto using FoxFarm Tiger Bloom.