you want little nitregon during flower. on the NPK on the box you want low N and higher in the P K. i use a bloom nute with no nitregon but i do add bat guano 8-3-1 to my bloom nutes the 1st 30 days in flower.what is the best flowering fertilizer,from a local store like Lowes,homedepot,wal-mart....and so on.