Okay so I'm wrong 😆. Not really any nutrition in 707, though it has more water holding capacity, less perlite, less pumice, and designed for large containers. I use a 30 day type of composting when I amend the original so stuff has time to break down and make some microbes. My recipe has been great for my photos, but I used a lighter amended soil for my autos forgetting to add p towards the end. I got the recipe from Weed Pharma and it worked well, would have been better had I fed p (top dress) and more teas though.