All strains will stretch during flower, period. The strain your growing looks like it takes 70-75 days to flower and is sativa dominant. Dude, you have too much weed packed in your box. I have grown quite a few sativas and they typically stretch about 2.5 times during the first 3-4 weeks of flower; some even a bit longer.. Some people may say BS, but you may have better results getting rid of a couple of plants. Sativa's really like to grow like a Christmas tree.. If you're still in veg, you can start pruning. I do this ALL the time.. The plant in the photo is on a cart that is about .5 x 1.0 M (2' x 4').. This is a Larry OG Kush that was FIM'd.. At the beginning of flower (day 1) it was maybe 6" above the trellis.. The carts next to each other in the 2nd photo would have about the dimension of your cabinet.. that's 3 plants. The AG you have will grow similar to the larger plant. If you provide a bit more info and pics you may get some more targeted advice. Peace, Farmer Rich