I need help, my plant is 4 and 1/2 feet tall it was in veg for 3 months. I have it under a 400W HPS and its been flowering for 5 weeks on a 12/12 light cycle. Lights on at 6AM and off at 6PM. Nutrients are fine, I am fighting a bit of a spyder mite infestation but it is undercontrol. What can I...