What are hydrosols? Hydrosols are the floral waters that are produced in addition to essential oils through the distillation process. These waters are saturated with the essence of the plant just like essential oils are. They are are what remains when the oil “pops” out of the condensed steam. Like essential oils, hydrosols have many therapeutic and health supporting benefits. But they are much milder than essential oils. They are slightly acidic and thus make an unwelcoming environment for bacteria. Therefore, hydrosols typically last for one to two years, and in some cases even longer. Because of their pH, they can be toning to the skin. If you haven’t tried using hydrosols, you are in for a treat!