How far into vegging until i can add nutes?

I have foxfarm "grow big" and was wondering what the guidelines were to using nutes during veg and how often to use it. I have several differant clones that are into day 5.

they have a pdf feeding schedule on their website.

You can give a plant nutes when its tiny, what you mean to ask is how much nutes can you give.

I give clones that are showing roots, and are ready to go under a high wattage light, a 10% strength solution IE if your nutes say;

100ml to 10litres;

Fill a 1ltre bottle with 1ml of nutes.