Hey, so, typically once you see stigmata. You will get stretching. The one in the back is a few days from being done in pre flower. The front one, is in early pre fower and has another 7-10 days growing
Try to keep a steady temperature as you can. So if it's cold at night. Run your lights, and make it so when they sleep. Your room is at its warmest
7-10 days left. You'll have tons of hight to spare don't worry