My plant isnt growing i dont think.

[AMurKyX]

All of my plants are doing moderately well aside from one. I k ow its sitting a bit lower than the rest but the light is still giving a good ppf reading. I just gave them a watering because the soil was starting to get pretty dry. Any tips for why this baby might not be showing me she is happy?

 

[AMurKyX]

also, the leaves are wayyyy darker than any of the other plants. Second and third pic are a little older but still work for comparison to other plants, the pics are from the day i lst’d

 

[AMurKyX]

Close ups