Agua Fresca   ﻿ Agave Nectar ﻿ Agave nectar (also called agave syrup ) is a sweetener commercially produced in Mexico from several species of agave , including the Blue Agave ( Agave tequilana ), Salmiana Agave ( Agave salmiana ), Green Agave, Grey Agave, Thorny Agave, and Rainbow Agave.