I transplanted all my plants roughly two weeks ago and they are currently 4 weeks old. They are however small for their age.. I have 20 going and currently they range from about 3 inches to 6 inches (will post a picture in an hour or two). They got kind of a late start due to horrible lighting conditions for their first week because my HPS shipment had an unexpected delay. The tallest of the bunch (big bud) seem to have some yellowing starting to occur from the bottom up. All of the plants look like a lighter shade of green than I've noticed in my past grows, I'm wondering if my plants are lacking N. Anyway, to the question at hand, I've been searching for this for the past few days and have come across vastly different opinions ranging from 1.5 weeks to 2 months. Should I give them a light dose of MG all purpose nutes?