I dyed my hair before dreading and redyed it at about 2-3 months. They're almost 8 months old now and have been bleached twice and dyed with conditioning dye (the one-step stuff that comes in a pot- I used Punky Colors) 4 times. The upkeep with demi-permanent dye was a bit much, so I had it dyed permanently at a salon, but with allergic results. Overall though, my dreads, even as babies, didn't have any ill results from my dye fanaticism. Best luck!