you apply the nutrients every res change. which you do every 2 weeks or 10 days. um you flush at the end of the grow the last 14 days should not feed any nutes.i dont know were your getting the valve from.maybe i missed something. its not rocket science bro you just got some studying to do.And how do you apply nutes? a seperate line or in the mix of the regular res? And if its in the res how often do you flush? If they are in a seperate res and you can apply nutes by the switch of a valve, thats almost rocket science! Are the mini sprinklers running all the time?
i like the sound of that Rock Juice but i cant find it anywhere can you post a link?I know its been over a month now since ur post, but if u have this problem next time try a product called Rock Juice.. Its a blooming product that is used in weeks 3-6, and wat it does is stop the plant growing upwards and re-routes all the nutes to the bud sites. It gives u real tight weighty buds. In ur case it would help as if u give it a little bit wen they have reached the desired height, then they will stop growing up and ur stems will start thickening to wat resembles hard wood. Also u wont get the massive height kick that comes when you start to flower them..
Hope this helps u for next time or any1 else who has a similair problem.