Just read an article in Skunk Magazine by The Rev. He says he sexes seedlings in 2-4 weeks by placing them under 12/12 lighting as soon as they break ground, then switching to 18/6 lighting after they show pre-flowers. He claims no issues in this because seedlings in nature usually break ground in early Spring when the days are normally shorter. I am going to try it as I have mostly regular seeds. anyone back this up?
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