just want to add that "ground soil" is not soil, its just dirt. Soil by definition has organic material. what you got would benefit from anything. miracle grow, piss, poland spring. go to agway or home depot or whatever you got and get a small bag of 5*10*5* dude, even a handful of mulch/compost
i know realize reverof posted re: cheap tomato nutes, that is what i was also referring to, 5 10 5 is the ratio of nutes. As you already said you cant afford even a 5 dollar bag, i would suggest you look into making
compost tea as a cheap substitute.
oh also props for getting them this far