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discoloration yellow tips

  1. M

    Help to ID problem - pics inside

    So, i let pictures do the explaining. Giving nutes have not helped sop far. An all the problems where there before nutes where given. I have all the deficiency tables and stuff so my guess is - potassium deficiency? Too much light? 250w HPS grow light Two plants - Silver Haze #9 and Sin Tra...