What is wrong here

This is the leaf, the new growth is very skinny and whispy

Thanks for the feedback!

How old is she? What soil? And how often and what are you feeding her

that kind of looks like big ph swings, but its very hard to tell from one picture of one leaf and no other info. you in soil, coco, or hydro? what ph are you using when you feed. what are you feeding, how much, how often? talk to me, goose

Ah the age of instant gratification. I think you'll find all your answers around this part of the forum.
https://www.rollitup.org/f/marijuana-plant-problems.65/