Not sure wat u mean,it doesnt mean anything,thats just wat the intersection of the stem and petiole is called,a node.
U'll want higher P and K than N,but thats just very basic.Got sum pics?
Flower when your plant takes up half of the space of your setup as for nutes during flowering I suggest a simple sugar water solution start of with 1 tblspn per gallon then after the first week of use increase the dose to 2tblspns per gallon that's all I used on my plant (R.I.P. Juicey) I had some dank buds on that thing