I'm a newbie myself, but from what I've learned, Miracle Grow anything is usually a no no for cannabis plants. All of their products usually have some type of time released fertilizer, and you don't have any control of when or how much is released. I used some mg perlite, and it caused multiple nutrient problems for me. Just something you may wanna consider. Sorry I can't be of much more help, but I don't know much of anything about outdoor growing. If you haven't already, go to the introduction page, introduce yourself, and invite some other growers to your journal. This is a great site with plenty of knowledgeable growers who are more than happy to assist. Good luck with your grow!