if your only 2 1/2 weeks in its way too soon to be giving nutes!

they are going to get nute burned... which i could be wrong, but that looks like exactly what is happening to your lower leaves that are yellowing.

and you gave a double-shot of nutes? i;m not familiar with the fox farm line (i know its popular.. but can;t get it here) but wow that seems like a huge no-no compared with everything I have read... everybody else (non-hydro growers) seem to start nutes around the 1 month mark and only give them like 1/4 of the recomended dosage at first and work there way up to stronger strengths (which generally still doesn;t exceed the recomended dosage)...

what is your starting soil made out of? the main reason people don;t give nutes right away is because the soil contains nutes in it already... your only adding nutes to replace the nutes that get used up from the soil... if your soil contained nothing to begin with (this would really mean its not soil i think...) then this would make sense though.