I live in atl and my scalp is like that too. Perhaps it is the water
Maybe you should chelate?
Also, I find that the flakiness isn't so bad if I do one of two options:
1)
lightly oil my scalp immediately after I finish my hair and wash often [2x/week] which my scalp doesn't like or
2) wait longer in between washes for a few weeks (like 6-7 days instead of 3-4) and put absolutely nothing on my scalp, which my hair doesn't like.
I've found that my scalp is pretty itchy/dry after styling my hair for a few days, and then it turns to itchy/dirty, and then I
have to wash. That makes me think that the shampoos I like don't work with my scalp and/or my water...I'm not changing my shampoo because it's great on my hair, so I just do the other necessary steps.
HTH some