From a fellow grower:
I am not sure what I am doing wrong and just wanted to getting some insight from an expert. Right now I am using a homemade soil blend of peat, worm castings, vermiculite, and red rock for aeration. Feeding with fish fertilizer and kelp every third day and watering with worm tea in between, while also misting leaves 1x per day with a blend of water, chamomile tea, and hydrogen peroxide to keep away pest and fungus. Under T5s, using a PH of 6.5, starting in 4in pots, transferring to 3gal then to 15gal before flowering (where they would then be transferred to the HPS). It has been about six weeks and the girls are still only approximately 8 inches tall. I feel I am doing everything correctly, I don’t know if it is the seeds or something on my end possibly with wattage or fertilizers or potting size.