What does this look like?

I got some soil plant going. I transplanted them to their own pots about 5 days ago. I am using cfls. The last time i checked the ph (when i re-potted soil) the run off was about 5.7 and they are about 6-7 weeks old (small huh?) all of my baby are doing well ,the bottom couple of leaves are yellow but other than that no problems, except for #3. The bottom leaves are yellow yes, but there are also dry brown circles on them. Anyone have an idea why?

1# sick plant, #2 sick plant, #3 & #4 somewhat healthy plants

Thanks

Are there any fertilizers in the soil that you bought? How often do you water? Looks like nuteburn to me and a little dry but otherwise good.

Edit: Wait wtf 6-7 weeks old. You just wasted alot of your time. That should be tall and flowering now. How much light do you have and next time read b4 you try n grow.

P.S. Runoff should be around 6.5-6.8 for soil.
P

I am just kinda experimenting, i have my real grow going (6 hydro plants). I started these because i was bored and its just bag seed. I will flower them in another month or 2 when my hydro really gets going (so they are in for a long veg) but i want to see the result. I have read and ALOT and a extra long veg dosent hurt your plants in the slightest. I started these outside. They have been inside on 24-0 for about 2 weeks now. But thanks for advise i thought it was nute burn. It was the first time i added nutes to my plant. BTW i water about once a week, I am using Expert Gardener soil and all purpose plant food. Hubbies pay day Friday so i will be investing in alot better nutes. Any other suggestions?

Thank much!!