Do you feed them nutes every watering? If not - then - give them plain water, or mix a tea blend if you use that. I feed my plants nutes/nutes/tea or molasses.
Or don't.
Start them on bloom next watering. Pistils are shooting up - preflowers are full-on, so help them bloom with what you have for them.
They look very nice. Color could be a deeper green for my liking, but they're not my plants.