First Grow 2x2 C99

I have no idea what is wrong with her. She’s still 10”. There was no stretch at all and she’s tiny. I did everything right. Down to taking her leaf temperature so that she would be in the right VOD range. She’s been super healthy. Leaves always perfect, temp/humidity always in range, ppm in and ph perfect, light is. 125w qb with Cree red diodes. Coco and perlite medium. And yet she’s tiny and barely growing at all. I’ll be lucky if I get 1/4 oz off this plant. I’m so sad, I put so much work into doing everything right and this is what happened. :(