First ever grow

Hi all hope your all well

currently doing my first grow and want to see if you think it’s going well or if I need to change anything etc

plant . Jack herer

lamp . Led famurs 1200w

tent. 0.8x0.8x1.2

nut . Bio bizz

medium . Coco coir

water . Ph 6.2/5

light . 18/6

temp . 24/26c 40/50 humidity

plants been growing now for 6months and doesn’t seem to be getting tall or wide, iv carries out low stress training and topped a few times but still the same,

feeding 1 times a week started with 1ml bio grow with 1L water l, upping the feed and water each week, then when flowing using bio bloom and top max

here are some pictures of my set up, any help or tips would be great, Tom