well i usually like to start once its got its first set of "real leafs" i use a "all purpose fertilizer" from schultz heres a pic of a plant about that age and MY fert... if its a "all purpose" you should be fine i think... just go by the directions at first.. i add a bit more then it calls and some superthrive to the mix every once and a while and i water every other day alternating fert water and tap water from the hose.. my plants stay pretty healthy too! good luck man looks like a good start also the best way is to find what YOU like right because in the end, no mater who you ask they will give the same answer "I ROLL THE BEST BLUNT!" LOL :hippy: