So, I went to my local grow store on day 13 to get some nutrients. Up til then the plants were nutrient free, just Pro Mix BX and they looked like they were nute-deficient. I bought bottles of the Botanicare Promix Grow and the Bloom. I didn't get to feed them those nutes yet since it's been rainy but I decided to use the SuperThrive foliar spray. I followed the directions on the bottle and two hours later there was nutrient burn on the leaves. So, I won't be using SuperThrive again. It's been a tough few days but I'm sure they'll recover.
update day 19: They're looking good, about 3.5 inches tall each.