where to purchase in NC

I recently henna'd with some Henna that I purchased from Whole foods in raleigh, NC. The ingreadients say pure henna thats it. I mixed my henna with chammomile tea, coconut milk, and honey. It turns into TRUE MUD and takes FOREVER to wash out!!!!!!!! Am I doing it correclty? Is it suppossed to be like mud in my hair? Is there any particular place I can purchase in Raleigh NC? And Nikki, Thanks for the heads up on the H&M store!!! I was so super excited I went when I got off work friday but it was chaotic!!! So i only purchased one shirt.