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The recommended combination of Dutch Formula 1, 2 and 3 during the 18 hour vegetative stage is the best guarantee for high quality results and strong, healthy plants with lush green leaves. Dutch Formula GROW creates the ultimate conditions for crop production during the next stage. You should stop the application of GROWbetween 21 and 30 days after your plants have entered the twelve hour flower phase.
Light intensity or cal/mag def? Something third? I raised the light a tad and fed a teaspoon of Epsom salt to the res, plus gave it some adjusted and fertilized water with more calcium than it's used to. It's only one leaf for now, I just want to make sure it doesn't spread. 
Any experience with keeping a seedling in 12/12 to begin with, then switching over to 18/6 after the first week? Because I did that this time for tech reasons, and I do wonder if I produced a hermie. My own notion is that it will just set me a week back perhaps. Anyone know tho? 
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