how do i know when the veg stage is starts

this is my 4th week sinse i germinated them how do i know when to start pumping more nutes during the veg stage

dont pump to much to quick but i would giv em a shot now

vegative state is from 1 week from potting untill flowering starts, nutes in soil deplete in about 2-3 weeks.

I use chemical nutes and i start with nutes from the day i put them in germination untill day 10 before harvesting.

What soil are you using ?

if your using MG i would wait for a better reply since MG has a lot of nutes.

don't put any nutes if your using MG for a while. it'll burn your babies...

and if your not in flowering, your in veg =)

im growing in clay pebbles, so how long does the veg stage last or is it up to me when to change to 12/12

it's all up to you
just know that when it goes into flowering stage
expect double the size you have rigght now because you're plants get huge during flowering if you take good care of em

yeah miracle grow is a mistake. but always start out small with the nutes. as the plants get bigger and stronger, up the dosage. youll be lucky not to have gnats with that soil by the way.