second grow yellow leaves problem...pics

ok so its been vegging for 20 days now, growing nice and bushy, but recently noticed some yellowing on the leaves. i dont feed often in fact i fed once and it was with minimal nutes at seedling stage. anyways im using mg organic and potting soil, even though i heard it sucks, maybe this is the reason why it sucks. cant diagnose the right problem. i did a ph run off with my ph pen and was at 6.6, so i ruled out the ph factor. now for mg i dont know if it is the case probably is but im afraid of adding nutes if its already in the soil, or if i should just flush the soil and give it a slight 20-20-20 feeding.
also im leaving for 5 days and wont be able to keep an eye on the so i dont know if i should flush before i leave or when i get back, the other two babes are doing great.
using 3-42w cfls
2-26 w cfls,
temps usually 60 at night and between 60-80 day temps(kinda hard to keep a constant temp with minimal air supply ie, the window but its minus 20 celsius here.)
two pc exhaust fans
one inatke,
one ocsilating, one blowing the canopy heat around
anyways heres pics
the first two are the sick plants

and my bad i didnt mean magnesium i actually meant nitrogen but stoned as fuck anyways if anyone could help that be cool

ok so i guess no one has any suggestions? i thought that people were suppose to help one another out in this site no matter how newb one can be. but i guess i thought wrong. i see this happen to a lot of "newbs". no one gets replies even after a couple hundred people would view the thread. anyways thanks all for none of your help

trains strain said:

ok so i guess no one has any suggestions? i thought that people were suppose to help one another out in this site no matter how newb one can be. but i guess i thought wrong. i see this happen to a lot of "newbs". no one gets replies even after a couple hundred people would view the thread. anyways thanks all for none of your help

Click to expand...

I can only give advice from experiences that I have under my belt. I'm still pretty new here too.

I had a situation almost identical to what your look like. I wanted to make sure I fixed the problem, so I actually did a few things, I'm sure that's against everyone else's advice, but...

I transplanted into a bigger pot, and flushed it immediately afterwards. Also, you wont find many Miracle Grow fans on here, even if it is freakishly easy to find.

I would look at your local hardware store or even WalMart and get a few Y's for those light fixtures, you know, the ones that allow you to put 2 bulbs in one hole? I grow with CFL's too, and I can say you want 4 per plant.

If you choose to repot, get some dirt. I mean, dirt from your local hardware store. The $1 / bag shit, and mix it 75/25 with basic sand.

I found a high ammonium nitrate fertilizer, and mixed a very small amount in a week after repotting.

As I said, these are noob ideas, but they appear to have worked QUITE well in my case.

from the looks of it......they look deprived of nutes! The temp also is too high.....lower the temp to around 70 and you'll be chill.....humidity under 40%..........and if they start to burn at the tips or start to wilt that means your giving them either to much water or nutes! try some of this and hit me back in a day

Sorry man but you got some issues goin on. UR plants are way small for 20 days .veg. Mine are that big at 10 days.Ready to start flowering25 days average and 10-12" tall.Sorry I dont hav the answer for you LOL

Dont know why you would give any nutes when at seedling stage, doesnt make any sense,, especially when, from what you say, the soil already has whats needed,,, but,,, Ive heard someone else say that mg soil needs to be flushed a few rimes to drain out the nutes so it doesnt mess w/your plants, then add your own as needed,, but Ive never grown in mg so cant say for sure,,,, now,,, the yellowing leaves,,,,, If you look in the growfag at the top of the page under,, plant abuse chart,, it will give pix and then you can match up your problem then,, always helps me in times of need..... GOOD LUCK......

ive had simular probs with a few plants and i thought it was a nitro deff but it turned out to be the opposite to much salt build up from nutes sometimes looks exactly like a nitro deff... if ur gunna flush i would wait till u get back

they look hungry except for the middle pic-that looks burnt

thank you all for your advice finally some input lol. i like to hear what people have to say even though it could be critisism but thats the only way to learn right, take it all in, learn from mistakes and grow right in the end. so thank you. ill have to try all these things when i get back.