Definitely want a good soil, fox farms is most recommended but on a budget its a bit expensive. Some people say that its real bad but I have grown pretty decent plants in the miracle-gro moisture control potting mix... and ya u always want ur area to be clean the chances of that plants problem going to ur next plant are that it probly won't happen but its up to u I guess but I think u just happened to plant a shitty seed...

I would definitely recommend that you get those T8s instead of cfl's