Why my plant dont high

Lower the power of your grow light, in that size of tent that much light is still too much even if u hang it in the sky

do you have the fc 4800 at 100%? That is too much for vege. Probably even at 36". don't feel bad. i did the same thing first run with it... and it's worse cause i know the math, lol. All i had to do is think about it for a second, which i will do for you. Go to about 66% at maybe 24" and adjust from there. This is a light that can require CO2 in bloom over 12 hours per day, depending on area of intended coverage... if you do that over 18 hours you can see the problem adds up 50 % more photons than the plant can handle per day. At 36", this is quite a bit less compared to 24" distance, but could be too much. When you flip to bloom and up to 100%, you'll keep whatever safe distance you found before that results in proper stretch you want to see. 18 -> 12 hours will be in proportion Side note -- are you allowing any dryback? looks like something funky is going on with leaves there. Could be low P if not overwatering? but to guess this without knowing what you have feed is jumping to conclusions... refer to a leaf symptom chart.. consider recent irrigation a habits..

First of all, Im assuming you mean why are they not growing more/higher right? Ok, so you topped the plant. that means you cut the growing tip off and told it to grow new tips. That takes time...its not a few days. Second of all- how many "nodes" did you have before you topped? Hard to see, but I only count 3 or 4 maybe?? Personally I would have waited longer to top the plant unless your trying to grow out a mainline...and mainlines take up to 9 weeks to develop properly BEFORE you switch the plant into flower and thats another 8-10 weeks on top of it. you could move the light 4-6 inches closer for a week to 10 days then move it back up again as the plant grows...but other than that its actually not a bad lil plant. are you running the lights for at least 18 hrs on per day? If not then maker sure your lights are on for at least 18 hrs each day during veg. Drop the light a bit and just be patient my friend ok. if it still looks like that in a week PM me.

It's not that bad. The plant had many internodes. Just be sure to give radicating solutions and some radications booster. Be sure also about giving some foliar