About to get into week 2 of my gorilla cookies aut...

You have to feed your plants since you growing in coco You can use grow and root nutrients, the regular vegetative nutrients. With flower bloom and other fancy extra nutrients you should wait. they have a different mix of NPK and stuff not needed without Flowers/buds.

I feed mine at thi stage. I wouldn't give it any more than a 3rd of the does. I can't recommend seaweed/kelp enough.

Nutrients wont hurt since coco doesnt have any. Try giving half of recommended the first time giving nutrients in such an early stage.