This is my first grow and I have a dozen sprouts in red solo cups right now and their getting larger. So I'm starting to think of my soil options. Currently my sprouts are in 50% soil builder (Bumper Crop) and dirst which I had taken from under an old rotten log. I was thinking about buying more Bumper Crop that and just doing 50/50 again or I have a friend who can hook me up with soil dark ideal mushroom top soil for free. So I turn to you GC, Which option you think i best? Also if u have any other options, please say. Keeping in mind i'm limited on money and willing to do different mixtures with different plants to learn for the future.