Listen people. Do not fall to the power of marketing. There are three things that you should be concerned about. N,P, and K. All the rest is just branded merchandise to compel you to spend more. The numbers, if they are higher or lower, are just concentrations. Just get the cheapest home depot/wal mart brand you can find, and experiment with your plant to find out the amount it likes. Stop letting these yahoos make you think there's is any better. How do I know? Currently hold a degree in environmental science and I work the US Dept of Agriculture.