What marijuana plant food???

I'm unaware of what "Plant Food" is ok for my marijuana plants... idk why I decided to grow, not knowing what food or fertilizers to use SMFH. Leaves are light green older leaves fading. I'm sure it's due to low zinc. Plants are stund so I'm assuming I need to stick with low npk to get them to where they need to be. PLZ help. What fertilizers or plant food will save my plants!!?? Would very much appreciate some help

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Getcha some Dr Earth Homegrown. Can get a couple lbs of dry ammendments, and I believe they even sell it in a liquid concentrate now. The liquid concentrate will probably be a faster acting solution, but you could always make a tea with the dry ammendments.