Nearly two months old plant under 250 watt Hps lamp.

My plant is nearly two months old and I vegged it under 250 watt Metal halide lamp. I used npk 10 9 6 ratio for vegging and Im not planning on changing the foliar fertilizer. I dont know what strain is my plant and Im looking for some thoughts.My plant is 25 cm tall now and it is in 12/12 light cycle for the past two days. I did some water sugar yeast mix to increase the Co2 in the room recently and Im looking forward to see how it is going to work. Im planning on getting some gibberellin and apply to the leaves to increase my yield. What do you guys know about gibberellic acid ? Please share your ideas advices and help me to estimate my yield. Here are some new pics so that you know what Im talking about

I guess your not happy with the progress? Depending on the strain it might be just be a slow grower. I find bag seed phenos are sometimes super wacky.

I would suggest losing the foliar feeding. Sometimes by doing this the plant isn't putting energy into growing a big root structure. Or at least that's my take on the matter. In fact, it's really one of the only things I see with people that foliar feed, the have slow growth. They think they are doing EVERYTHING possible to help the plant and actually I think some strains just don't like it(or like it too much and feed too much through the leaves). JMHO.
What are your MIN and MAX temps? What is your RH%? How often do you water? What is the ventilation situation? Maybe I could help you with a little bit more info.

My plants were vegging really slowly one time and I realized that I didn't have proper air flow in my tent(i don't mean a fan blowing on them). As soon as I corrected the matter, bought fan speed controlers, a 4" intake fan and a 6" exhaust fan they took off. Before that they spent a month SLOWLY growing, after i fixed the issue they grew more in the first week then that previous month.