Yellow leaves young photoperiod girls

How can I ad more nitrogen? I have lots of plagron products like the alga grow & power roots, thanks

They are in nitrogen deficiency. First check run off ph with calibrated tool. Then if that is in range your plants need nitrogen. They should be fed about 10 to 14 days old. Very light at first. Baby plant baby amounts. Can't feed a buffet to a new born. You get the picture. Adjust feeding amounts based on size and experience with product. Recommend amounts on packages is usually too strong. Good luck and happy growing 🌲🌲🌲👊

They are in soil, normal soil for Mediterranean plants without nutrients, I have plagron alga grow & power roots, will give them a small amount when they wake up, thanks

Start with a very small amount mind . They are fragile at this stage.

Are you in Coco ? They need some nutrients by the look of it . Light is the plants food and energy , if there's no nutrients in the substrate then they can't absorb the light , they're hungry .