Don't trim anymore.. keep your 400 watter about 18-20" away from the tops of your plants... If it's in your budget, get some 'Bud Blood' which helps show your flowers faster and sooner, giving you a bigger harvest, and then I use 'Big Bud' throughout flowering also 'Hammerhead' for that boost of phosforus and potassium.. gives ya bigger, fatter, denser, smellier, wider, more resinous buds.. all can be found from Advanced Nutrients - Dr. Hornby's...don't remember if u got 1, but have AT LEAST 1 OSCILLATING fan on your plants.... for numerous reasons.