When should I start Nutes

Hello RIU world

I have 3 ladies in FFOF soil that are 3-4" tall at day 15. They were transplanted to 8" pots last week from their starter cups. They have been under the 400W HPS for veg for several days now. They are healthy and I do not want to hurt them.
I have a bottle of FF Grow Big that I will be using. Instructions are 1 tsp/gall for every feeding or 2-3 tsp/gal once a week. Any input is welcome. There are lots of pics in my journal in my sig. Just hit the last page if not interested in my newbie ass getting supplies.

Thanks in advance everyone!

bump

Bump again. Anyone out there with an opinion on this?

depends on what soil ur using. u can probably start once theyre about 3-4 weeks old. if ur soil is real nutrient rich wait a lil longer. dont forget to start at like 1/4 dosage and work ur way up. good luck!

he already said what soil he was using.

start off very light with the FF nutes is all I can add. Better to under-do then over-do with the ferts.

To be honset i would wait, the OF is some pretty strong stuff and can feed a plant up to a month.

woops just skimmed over the ffof part

Thanks guys! Rep+ for the relpy and input. I think I will wait awhile.

Just a quick final update in this for anyone that comes across this thread in future searches .... I should have started nutes at this time. Not starting them cost me some lower leaves to nute deff. Had I been using CFLs still I would have been good but as soon as I turned on the HPS they went into feed overdrive.

So final thought....

CFL, Stay with the soil without adding chem nutes until later in veg
HPS, start giving them added nutes at the 10-14 day mark.

sounds good doogleef i will keep that in mind