if its a good strain and grown well, just one wil do.

if you mean selecting the best/strongest individuals for long term cloning or breeding, well you cant really put a number on it, theroreticly you could grow out seeds forever to find the strongest plants.

you might get a runt once in a while but reputable breeders strains are generally good, because a lot of breeding work has already been done to produce the seeds. its just the genetic wheel of fortune
babystarbud Reviewed by babystarbud on . How many seeds does it take? Growers-in your experience with growing from seed - how many seeds do you have to crack to get a mid to high level cannabis producing plant? In other words - lets say you order a pack of seeds from a reputable breeder (Reservoir, Subcool, Soma, Serious, DJ Short, Mr.Nice etc). How many of them are chronic level and how many are crap? Rating: 5