Oh I see, it's about that FFOF soil huh? ( again ) lol You know for you ta talk about it so much, you sure don't much about it. You would aproach it jus like you would with soiless, when they start showing signs of being hungry feed em. Usually, only after a couple weeks. The OP jus has to dail in the nutes, flowering plants use more nutes than veggin plants do. In flower I use 2 tsp of Tigerbloom at least once a week, sometimes twice and 1/4-1/2 cup of Bigbloom every other watering, and I don't burn any thing. Compare this to what the plants in this thread have been fed with useing PBP nutes.... FFOF also has a microherd that needs ta be fed. I know what Clackamas Coot said about it. But I don't think he ever stop and thought about how hot a compost pile gets, up around 200 hundred degrees if I remember correctly, and it's the micro critters that do it! I think yud have a hard time killin it ta be honest. Again, jus my opinion on things... later, BC