I am using miracle grow mixed with generic potting soili know they sell a green bag for vegetative growth, this is the flowering one with higher P and K.. youre gonna want more nitrogen for vegetative growth then when you start flowering switch to this. but yeah theyre pretty young still for nutes. whats the soil?
Your soil already has minerals in it enough to get you to transplant.Don't give them any nute's for a month at least. plain water only.