ard to gauge the size of the leaves but it looks small to me. It has the right amount of leaves but looks small. It looks like you’re growing in coco. You need to be feeding with a light feed every watering. It’s called fertigation. You want 100ppm Nitrogen and potassium, 30ppm phosphorus, 150ppm calcium & 15ppm mg. Coc has no nutrient that are available to the plant so if you’re not fertilizing it won’t grow as it should. Also, is the coco buffered? Coco sucks up a lot of calcium so if it’s not buffered you need to add more calcium in your fertigation formula. Good luck.