i don't have the time or the patience for more than once a week. don't everybody jump me but in the winter i go two weeks. for me this works and my hair thrives from it. when i wash it too often, no matter how much conditioning i do to it, it just doesn't act right. it will be very lifeless and not hold styles. people who knew me when i was a teenager (Teerama) remember that i HAD (I am trying to get i back to health and long again, that is why i am on this board now) long healthy hair for years and back then I washed every two weeks. i think it all depends on how your hair reacts and your lifestyle. i think since i have all this color in my hair now that the less i wash, the less breakage i experience. my hair is so fragile right now that i hate to manipulate it too much. i wear a doobie wrap for the first week after the wash and then the second week i wear a pony (loaded with evoo and moisturizer) or i do the half weave thing. after the second week i get it washed and i ask them to lather a few times extra to make sure it is super clean. i think that is one of the reasons my hair is doing well even after my color horror. i guess the ladies without color can wash more often.