Potting soil (seedling mix) with no nutes added, is best. I use what's available locally. I flush the soil before use. (to wash away, excess nutes)

and 1/4 strenght nutes, later.

...http://boards.cannabis.com/basic-gro...acle-grow.html
Dutch Pimp Reviewed by Dutch Pimp on . Soil analysis Got my 2 babies out of the dirt 5 days ago and I read on other threads that miracle grow is not suitables for baby plants. My soil is not miracle grow its Potting Soil Plus from Schultz (canada) Guaranteed Minimum Analysis per volume is Total Nitrogen (N).......................0.008% Available Phosphoric Acid (P2O5)...0.012% Soluble Potash (K2O)...................0.08% Rating: 5