I'm not a hydro grower, I stay with soil but to be honest they are in a fragile state at that age. You may want to wait a few weeks before introducing any nutes, but by all means do your homework, keep checking the thread. There are many many more experienced growers then myself, just passing on info i have received in the past. Best of luck to you man, hope your buds be strong and sweet!!!

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God made dirt, so it can't hurt