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I water every 3 days and it usually gets pretty dry on the top. I'm gonna flush it right now. I checked the soil and it has a ph of 7.1 i'm gonna get some powdered sulphur to mix in with the soil to bring the ph level down. if neither of these work I want to try to repot the plants. do you think...

I'm using a potting mix soil but it also has miracle grow in it. I'm not sure what the ph is though, do you know how I can find that out. How would I be able to fix the nute burn problem

I planted my 4 marijuana seeds for the first time about 2 1/2 weeks ago under a 400w HPS light and they were growing fine for the first week or so, until some leaves on the plants started getting yellow from the tip of the leaves towards the stem and the new leaves are not looking too great. the...