Nitrogen ppm for different genera

[terryros]

I know that most growers, particularly with larger mixed collections, like to use one fertilizer strength that is probably a compromise for different genera.

However, if you could optimize the fertilizer strength for each of the major genera do we have any good information on what that might be? Would Phrags be really low (50-75) and Phals really high (300)? Where would the others sit or do we mostly guess?