I'm on the same boat as you...especially being a North Carolinian with this weather, haha. Scrubs slough off the dead skin before it can flake off, so while they're helpful, they act as more of a treatment rather than preventative. If I moisturize my scalp, it usually helps it from flaking in the first place. To do that, I usually rub in some light leave-in.

2c/2b with some 2a, coarse, dense, thick, low porosity
Growing out a CL bob. Currently at APL.
CG again as of 7/20/12

Cleanser: BRÖÖ Smoothing I.P.A. Shampoo
RO: Trader Joe's Nourish Spa Conditioner
LI: Kinky-Curly Knot Today
Styler: Beautiful Curls Gel for Wavy to Curly Hair

all-natural products, light moisture, humectants, argan oil
silk protein, synthetic ingredients, heavy oils/products, cowashing