Lemme tell ya this about the Jack.It will stretch when set in flowering mode.So,it will be your best interest to start the flowering at about 10 or 12 inches and keep the light as close as you can in veg and flower.You will be happy with the results! It being a sativa.Can take a bit more heat than the ak47.You still should keep temps at no lower than 72 at lights out and no higher than 86 at lights on.I had to learn all this the hard way! I'm sharing it with you and all! It would work well on the jack to LST at a young age as well.It will help with the stretching,too.You will end up with some fire ass weed! It'll lay your ass on the couch.It for real,medicine.

Ga Grown!