Henna (Lawsonia inermis L.) is one of the most important and historic medicinal crops. However, very little work has been done across the globe and the scientific community and common readers still require much knowledge on its various aspects. Soil salinity plays havoc with the sustainability of crop production around the globe. A thorough information of the salt-tolerance of important crops like henna help understand their sustainable production under salt-affected soils. This monograph focuses upon the salinity tolerance of henna at early growth stage.