I have naturally light brown hair, but in November, I wanted to try a red color, so I used henna. It looked lovely for a while, but it did not fade as the bag had advertised. Now, my hair is completely two-toned, and I just want it to look uniform again. Would this method work?
Henna Hair Color: Removing Henna Naturally | Morrocco Method

I don't want to bleach it (damage) or dye it because I heard dye doesn't react well with henna. Any advice would be greatly appreciated! I want the brown color back Thank you!
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