Yeah if you were doing the grow indoors using the Fox F trio and read the feeding sheet it does a boost of N in the 5th wk of flowering. Outdoors doing it guerrilla style I use time released packets that feed for 3 months and 9 months and they are a mixture of flowering packets and general nute packets then I dig a big hole and fill it with almost 40 pounds of soil mix, then I visit rarely until harvest or drought.