that plant definitely looks sativa. This means it will probably flower for a while and will continue to grow upwards. If you are concerned about the fence in the background being BREACHED, it is always possible to tie her down. Just bend that top down, and then keep bending...If you have another reason why you want it to flower NOW, then you can build a fram around it and cover it and uncover it twice a day so it will sit in 12 hours of darkness. Maybe more trouble than its worth for one plant..