Washing your hair everyday,imo, is a big no. Often, your hair will become dry & your body's way of compensating for dry hair is to produce more oil, which in return causes greasy hair. I also find that washing your hair everyday is the main cause of dandruff.
Yeah I read something about natural oils from the scalp taking longer to reach the ends of textured hair than non-textured hair. I can't imagine naturally having an oily scalp/hair. :lol: I can go weeks without washing but I strive for every two weeks unless I have a protective style in like I have now. In that case, I don't wash it until I remove it after 2-3 months. Time varies depending on the style though. As for hair growth methods, I believe massaging your scalp stimulates your hair follicles or something