How To Apply Henna To Texlaxed / Relaxed Hair. Henna can be great for both natural and relaxed hair types. In my henna for hair series, I go over the basic steps for successfully doing a henna treatment on relaxed and texlaxed hair textures. You can read about the benefits of using henna here. Be sure to check out my video below on how I apply henna to my texlaxed hair, and be sure to subscribe to my youtube channel to watch the whole series.