4th week into flowering yellow leaves

Using Fox Farm soil regular medium fabric pot 4 weeks into flowering stage I don't know why my leaves turned yellow the only thing I can think of is a combination of over-watering and maybe sulfur anybody else have any answers

give it some nitrogen, not too much or you will intafear with flowering

go go kid said:

give it some nitrogen, not too much or you will intafear with flowering

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I was think that too ..u know.. last crop i had a nitro problem in flowering stage also .thank u