A vaporizer without an herb grinder is like an hybrid electric car without electricity. Proper grinding of your herbs can boost the performance of your herbal vaporizer.
Vaporizers work best when the material is dry and finely ground up, close to powder form. Moisture left in your herbs will decrease the amount of vapor produced and will cause the vapor to be harsher than it should be. When you grind up the herbs super fine, you increase the surface area that the heat from the vape can reach.