if you go biobizz soil i suggest u to use biogrow and biobloom from biobizz too. I have heard that is a little hot for seedlings, so i would consider biobizz light mix for the first weeks and then transplant to all mix, you still have to use nutes all the way, it's not supersoil! Try to find a biobizz feeding chart and you will see what i mean.. Biogrow kicks ass i am not yet convinced with biobloom i ll tell you in 2 months! Happy growing!