Tuesday (Halloween) will make 4 weeks. Someone else i talk to said i maybe changed the light cycle too early and my plants were not sexually mature. When i changed the light cycle i dont think i even had pre-flowers. I believe you are right about the nitrogen issue. I have been feeding this plant GH nutes, all three parts according to the feeding schedule on the product label ever since they were one week old. Not to mention she is in Foxfarm soil with all those organic goodies. So last night i gave her 2 gallons of PH'd 7.0 water... the runoff came out damn near clear. But last Sunday, i gave her a little flush with 2 gallons of water too and the runoff was very brown... about the color of Jack Daniels whiskey