Week 4 plants seem to be doing well. Maybe a little short. Expecting them to stretch soon but I’m not sure each has a qb96 185 watts. Would this cause them to stay short?
Good luck on the grow. Don't over water in soil. Let it get dry between waterings and feedings. Plants like to breath too. If they can't bad things happen like root rot. Then your plants can die. What nutrients are you using?