Hi guys I have a mate of a mates mate that is doing a 600watt tent grow with an auto watering system he is 7 weeks in and just switched to bud lights at 6 weeks as the pistols shooting he is using rhyzontonic rooting and part a and b tonic but noticed yesterday the plants are only shooting 3 leafers from about 6-7 inches up to the top which is about 2-2and a half foot now they look very healthy but at a loss as to why. It's his second grow the last was 9 trees same chemicals larger self made grow room which got him 2lbs 9ounxes. Any info to pass onto him would be great