User blog comment:JuliaCullenx/Question/@comment-7600752-20131215223140

Meyer has spoken about this. Hair and nails are dead tissue. So they don't lengthen or grow on a vampires. If a vampire were to have his hair ripped off....that's the way it would stay. If a vampire who had long hair decided to cut his hair short....he'd forever have short hair. Personally since the nails and hair are the ONLY things unchanged when once becomes a vampire....I personally don't understand how their hair can endure all those centuries without molding or rotting. Vampires like Aro have had their same exact human hair for thousands of years. That just sounds udderly unbelievable.