Homemade (naturally sourced) Hair Dye

What kinds of plants and such can I use to dye my dreads?I don't want to do it yet - until my whole head is dreaded, minimum - but I want to eventually be able to do tips and the like. I'm into really bright colors. (I was a Manic Panic, etc. dyehard for years.)
updated by @stephanie-shepherd: 01/13/15 08:47:47PM

If you want bright red: http://www.hennaforhair.com/ and there is a whole list of personal mixes if you scroll down the mix page: http://www.hennaforhair.com/mixes/index.html but yeah, I would definitely use henna when the dreads are more mature. Henna is healthy for hair (and can clear dandruff, lice, etc.), but is super conditioning.

MzElaineous said:

If you want bright red: http://www.hennaforhair.com/ and there is a whole list of personal mixes if you scroll down the mix page: http://www.hennaforhair.com/mixes/index.html
but yeah, I would definitely use henna when the dreads are more mature. Henna is healthy for hair (and can clear dandruff, lice, etc.), but is super conditioning.

Thanks for that... what I'm really looking for, though, is those colors that don't ever naturally show up on someone's head. I'm the girl who had royal purple hair with two-tone hot pink highlights. I've done blue, purple, turquoise, red, black, and, of course, pink. Pink is majorly important. I'm really looking forward to seeing all the responses to this thread. I want to be nice to my hair, but I also really want to not give up my funky colors.