Ménage à trois

Week Two is showing mixed results in the individual growth of each plant. The White Widow Auto is growing extremely slow, only just now beginning to produce it's first set of true leaves. It was a Free Gift Seed so, perhaps that has something to do with its ability to grow strong and vibrant? COBRA ONE is a beast! It is approximately 6" tall yet, has approximately 6 sets of side branches. Each are extremely tight/close to the others. COBRA TWO is showing the same growth pattern yet, is half the size of its sister. The Blueberry Auto (another Freebie) seems to be growing at a natural, normal pace. Approximately 6" tall with 4 side-branches. Now I have never grown any of these strains before so, I am unsure what to expect regarding growth patterns or nutrient requirements. Today is the first time I fed the plants with a mixture of nutrients. It was a diluted feeding and depending on how they react to it, I will add/subtract from the mixture. While the Grow Big is the main nutrient, I wanted to see what benefits the Fish & Seaweed might do for the plants. I also included just a dollop of Sensi Cal-Mag for preventative insurance. Each plant will only uptake what they need and since it was their first light feeding, I don't expect any adverse effects. I am still hopeful that COBRA TWO may turn out to be a Male, given they are from the same seed stock yet, having a different growth pattern. Oh, I do NOT intend on performing any Topping in this batch like I did during my first Grow. That is all until next week. ALL comments are welcome as I can use any & all advice. UPDATE: Week Two an One-half - COBRA One had grown so large and filled out so much, the large fan leaves were blocking the light from penetrating inside the canopy as well as hitting the lower side-shoots. The Last photo, I took a before/after of a light Defoliation. I cut the stems of the fan leaves, about 1" from center stalk so as to not cause too much shock.. (vs. snapping off)