Humboldt Nutrients Honey Organic ESIncreases Brix Levels By Providing Sugars To Beneficial Bacteria, Fungi, & Your Plants Humboldt Nutrients Humboldt Honey ES is a premium blend of cane molasses, yucca, kelp and ocean fish. This carb source is as unique as it is strong. The ES means Extra Strength. Just as the human body hosts beneficial bacteria in the digestive system, plants must host microbial life in their root zone to ensure proper digestion, growth and health. Plants feed