give it chance. you jst transplanted it. it's a weed and will grow. is it getting air in that deep pot? let the top of the soil tart to go dry/ light colored and then water a little. small plant. little water.
to big bang first grow.
you should have bout 70-90 humidity for seedlings. i put some water on a warm surface in my closet and it increased the humidity a nice bit. if ya have a propogator, than put the water in that to evaporate it.
dont use the hps until flowering, damage the plants and...