Stunted Growth?

Hey now!
This Critical Hog's been growing for almost 1 month. She's in Promix HP under HLG 100w. I've only fed low amounts of Botanicare Grow and Cal Mag. She seems really healthy but hasn't grown as big as others I've seen about the same age. It's winter here so 20210121_095310.jpg20210121_095351.jpg20210121_095435.jpgI have to heat and humidify the tent. Temps have been between 70-80F but humidity has been average 40%. You can see the wicking bucket I'm using for humidity. I have a humidifier on the way. Is this growth stunted? Could it be the low humidity? Maybe the little pot is too small? Should I transplant?
Any wisdom is appreciated.
Thanks
 
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