Why my plant has modest amount of stigmas (white hairs)?

It looks a little dark green to me. May be off base, but if it's a little nitrogen toxic, gonna get small harsh buds. Too much nitrogen, can't take potassium correctly. But probably is genetics like the others have already said.

if it is healthy and getting 35-40 DLI, it's simply genetics. If it's getting 35-40DLI and healthy, that means it's growing well. If it were underfed and getting that much light it would look stressed with overtly visible deficiency symptoms. intensity of light willd dictate yield relative to genetics. Some are more robust than aothers and there's no magic bullet out there that causes it as far as soemthign you can buy and give to your plant. Quality and morphology is mostly about the genetics. You'll never polish a low-thc turd. it's simply a low-thc turd. (or whatever characteristic you are focused on at the moment -- and not related to this particular plant, just a generalization of causality)

in most cases if plant is healthy , its genetics. not all plants grow huge colas, not all seed is set to be a monster. you can feed heavily and push plant ....

Fuzzysnout, Hope an experienced coco grower can review your grow and assist with a diagnosis, I wish you well. I do not think it is genetics or a slow to flower plant, which can happen. I would review your light height and ensure the dimmer % is set to manufacture recommendion for flower. Again, I only have two grows so take this with a grain of salt.... I think she may of had too much nitrogen in early flower/flower with no flushing in between veg, preflower, and flower. With the Tripart series in coco it is important to flush between veg/flower if feeding heavy as the nitrogen can hang around in the coco.