if you have absolutely no money, just get some tomato feed for about $3. That should get them to the end. Its not perfect but better than just plain soil, as in, plain soil with no nutes will prob just kill them eventally from lack of nutes. Anyways, you could have mixed mircale grow soil with your standard soil 40:40: and 20 perlite. That would reduce the harshness of the MG but still give you nutes that could last you till bloom, then at bloom you could buy some cheap bloom nutes. Unfortunately it does suck on a budget of NIL, i've been there and the stress almost killed me so I just saved up and learned how to do it better next time. So, if you can still recue the MG soil, mix it up and use it. Dont worry about superthrive as long as its diuted as recommended, it aint a nutrient tho, i dont think anyone really knows what the fuck it does lol some people say absollutely nothing. If u can't use the MG soil then spend a few dollars on some tomoto feed, or if possible, something with less P and K to N. I got a feed from the store the other day that is like 10 parts nitrogen, 1 park P and 1 part K. Would b perfect for veg growth. Because the P and K would not build up in the soil during veg. Then at bloom, u want something with mostly P and K to nitrogen. Should be able to get cheap ones, even at the pound store they do such feeds, check check the label. It will b better than nothing, just use them sparingly