A deep conditioner I'm really loving is the bee mine protein free deep conditioner. Smells like heaven and works very well on my curly hair. It has great ingredients, too. Beemineproducts.com I also have a review of it in my blog if you want to read up on it more. http://ricciolina.wordpress.com/2012...tioner-review/
Do you protective style a lot during the winter? Pardon, but which area do you reside in? My hair is more prone to breakage in the winter(the cold dry air here in nj) so I wear buns a lot more and twists, as well.
This isnt breakage related but rather growth related...Have you tried scalp massages too? What I do almost daily in the shower is I scrub my scalp with a shampoo brush in a gentle circular motion with whichever cowash I'm using that day (or you can use the pads of your fingertips.) It feels good, too. It will help stimulate your scalp and clean up any build up that may be covering your scalp. Good luck!