How to remove hair dye? naturally?

i dyed my hair red back in september and its still red even in july well just medium to bottom. My roots are growing inpretty fast you see alot of blonde now. Im starting to iss my natural hair color. Do you guys know any natural ways to get rid of the red. I dont wanna use anymore chemiacals tht cud damge my hair, and pls list the sources where u got it from. serious answers please thank you :)