Many states have laws that do not allow phosphorus in lawn fertilizer (maybe Texas, too?). Consequently, they are very high in nitrogen, no phosphorus and a little potassium. Usually, the analysis is something like 30-0-4 (percent by weight of nitrogen, phosphorus and potassium).
If those are your tomato seedlings in your pic, I don't see any definite symptoms of fertilizer deficiency, although one can't tell for sure. To me, they look like they could use more light and/or larger pots.
