although my (oily) dandruff seems far better since i started COing, i was wondering if anyone tried  baking soda? rosemary is supposed to help as well. i was thinking about adding a drop of it to the conditioner i put on my scalp, but i am afraid it will smell a lot.

I find apple cider vinegar very helpful with dandruff/psiorasis on my scalp.  I stopped shampooing daily with neutrogena t-gel, to follow Curly Girl no-poo routine.  When I do get an outbreak of itchies, i shampoo with mild organic shampoo (jason sea kelp) then rinse with 1:1 apple cider vinegar.  Leave that in while I shower, then condition.  I also made a spritz of half vinegar, half water, 5 drops tea tree oil, 5 drops lavender and spray on scalp before bed.  Vinegar smell goes away after it dries.  I use apple cider vinegar in between shampoos (twice a week).  It has got me off of t-gel completely.

I've been meaning to try rosemary oil.  Evidently it's known to help with hair growth but that may just be one of those folklore things.