Roots Organic has a new bagged soil that needs NOTHING added to it. It's called "Roots Organic 707formula". It has everything in it. A good friend and grower did a side by side test with his souped up soil and RO 707. OR 707 kick grew a better plant. I still have to buy/add guano, kelp and things to beef up last years soil but Roots Organic 707 is the way to fly as far as getting new soil. Also duly note that Roots Organic is the only true "organic soil". On I'm not a sales person for roots.lol. Just a great soil that may save someone a few $$$'s. Green Blessing.