Please help leaves turning yellow

you need to write more of what the soil is, do you add fertilizer and how often, how do you water, how much, what size pot is that, what light you're using. a mix of close up and more distant photos would be good. right now it looks like under fert but tell some more about this grow.

I haven't used any fertilizer the soil is miracle grow soil what fertilizer should I used for veg stage they have been growing for three weeks now I'm using cfls

Hungry?

What ferts are good for veg

people have had some trouble growing this plant in miracle grow soil. because of the soil you're using and some leaf tip discoloration, I'm not so sure that it's a lack of nutrients. I wonder if the opposite is the case. are you letting the soil dry out between waterings? you want to let it dry out because roots need some exposure to air and the only way they get it is by drying out the soil. also, it looks like you could raise your lights a little. it's really hard to tell right now because that soil should be good for many weeks, so if I were you I'd look at the bag and see what it says, now long the ferts in it will be good for. the yellowing itself does look like the soil is low on nutrients but that soil should be good for weeks to come. just don't know right now. if it looks like you need to add some fert, do so rather carefully so you don't over do it.

Yes I let it dry out before I water it but not to much what about some plain ol bat guano or some blood meal

YOu need to feed her and remove those yellow leaves they not gona be green again , you may have a mag defficency soil usaly hold / locks it out , u will need to add some if ur nute feed dosent have much in it , or use epsom salts which is magnesiem

the leaves look like a Nitrogen defficency but a feed will get her better , start low end of the suggested tho dont wana shock her or burn her

You should be able to start flowering those by now to or they will get massive later on ,

Either a N def or could be PH issue, miricle grow is problems in a bag, good luck.