Some people don't like Miracle Grow because it has to much nutrients. If you read the bag it says it's peat moss, wood chips, and paltry if (in California and Texas). I think in other states they might use straw in stead of wood chips. Not to many people have issues with their organic mix. Its just the one with 3 month time released nutrients. It's not bad nutrients, but it's to hot for seedlings. Ocean Forest is recommended because they replaced the bird shit with worm & bat shit. It's not as hot, so it's easier to germinate seeds with it. But some people will think even Ocean Forest is to hot. They say, fuck dirt, go hydro. Or they'll use gel, coco husk, pure peat moss, or even just perlite.
Any or no growing medium is fine. Its the level of nutrients you want to look out for. If it's a seedling and all you have if Miracle Grow or say you picked it up on a whim and don't feel like taking it back, then just flush the soil with a bit with warm water first. Now it's won't be as rich and the seedlings can better handle it. Remember not to add anything for a little while. Let it ask you to feed it and watch it closely.
I spend more time worrying about the genetics. You can give a ruderalis all the best nutrients in the world, but it won't beat a Sativa grown in bargain bin soil, no matter what. Get good seeds and relax. you gonna get high.
