funny you mention that, my current grow I started some DinaFem WhiteCheese seeds in straight organics, they were perfect till about day 8 and weird things was in the span of like 4 hours they went from perfect to shit both of them. I assumed it was maybe too hot for me to be starting in, I can't figure it out, because my GSC she still doing awesome and she was started in straight roots as well.
I am sure its not too hot. I add steer manure to mine and grow in it hahaha. But here is what happened the first time I used roots and this was to 2 plants. After testing the soil PH it came out to around 5. I have added a little lime as insurance to every bag after this. I now love the stuff though and it is my favorite soil. This plant was a perfect green clone and all I did was transplant it from a 4" pot to a 1 gallon pot. I had not fed this plant any thing and was using bottled water. The other plant I had looked the same.