Cfl's huh?,yeah you got at least 3 weeks.I don't know your watering schedule but feed once more then plain water every watering and you should be good.I like to let my soil be completely dry before I chop,fyi.GL.peace
I also ended the feeding 3-4 weeks early on my 1st grow and started it back again very lightly before I chopped.
Go easy , very easy and you should be fine.