Considerable growth in root size and stem. elongated because of lack of light as light was place so far. plant diverted energy in growing more long stem to reach for light. So, I realized how importanst light is and then bought and led light 600W which projects 4000 lumens. It was -3 c outside in toronto as it snowed.
Hey mate!
Judging by the picture i would let the little plant grow for a few more days ant then top it between the 2nd and 3th node that way you will get four main branches..
Good luck 🍀 with your grow!