you DO NOT want a soil with any kind of ferts added for new seedlings especially not miracle grow! go to a garden shop and ask for promix, sunshine mix or anything that is similar to them. a clerk should be able to help you out. just say you want promix or any other "nonferted" mix that is similar. 1 more thing, if you do get the promix or any other peatbased mix also getr some dolimite lime and add 1tbsp per gall of mix to get the proper ph for mj. also 1 of the most important things to add to the soil/soilless mix is alot of perlite (1:2 perlite:soil ratio, at least). this is absolutely necessary to keep the mix from becoming compacted over time and also to help keep the roots aerated.