I agree, probably not worth trying to save it at this point, the red stem is generally a tell that the plant is in disstress, environment or pH problems. Not alot of leaves on it even if you gave it more light.. Get good genetics, strong plants and start again, with a good auto you can be harvesting in 3 months To compare, this plant was planted mid October, in this photo it was not even 3 months old. Sent from my SM-N950F using Tapatalk