I don't live in the US so I can't recommend anything local for you to use but I'm using something called "Nitrosol" natural organic plant feed with 80g/kg N, 20g/kg K, 7 g/kg Mg, 6g/kg Ca, 4g/kg S - Micro elements, 60mg/kg Fe, 1mg/kg Cu, 1mg/kg Zn, 40mg/kg Mn, 23mg/kg B, 15mg/kg Mo - Growth...