k fella to harvest every 2 weeks ur goin to need 16 plants in flower all the time,tha means 16 in veg and another 16 rooting! iff u got ffdirt dont know to much about tha but my guess is ther,s food allready in ther,so wen u go shoppn id forget buying any grow nutes just the bloom! i use iguana juice 4 my bloom but it aint very often i use it ! i top dress my pots with bone and blood meal 2nd week of flower thats it! i mix up 1 big bucket of tea with the legendry rabbit poo,which i top up with rainwater as im using it so the tea gets weeker every time, and thats it really! with organics u feed the soil not the plant! gd luck and it,s alot easier than it seems really and u aint gora spend money to have a good crop believe me!