Absolutely all great answers so far. 👍However, if you're looking to just purchase your soil, I can only tell you what was suggested to me a long time ago, and that I still use to this day for both, my indoor, and indoor/outdoor grows. There are probably many great products, but what has worked super well for me is a mix of Pro Mix HP w/Mycorrhizae, Fox Farm's Happy Frog, and Ocean Forest. I use like about a 60% Pro Mix 30% Happy Frog, and 10% Ocean Forest. The Pro Mix HP w/Mycorrhizae supplements, and enhances root growth, the Happy Frog has a good mix of soil enriching nutrients, and the Ocean Forest adds some fish products into the mix for that extra kick👍 Kind of got to be careful with the Ocean Forest because it's pretty hot. Even just Pro Mix, and Happy Frog are a great mix imo. If you go that way, about 6 parts pro mix, and 2 parts Happy Frog has worked great for me too. Hope this gives you some more ideas.☺️ Happy growing!✌️