Humboldt Nutrients Liquid Underground is a worm casting extract specially derived from the best worm castings in the world, as well as bat guano and kelp. Rich in essential nutrients, organic acids, and beneficial organisms, the HN Liquid Underground provides gardeners with a bio-stimulant for soil organisms, as well as facilitating better plant nutrition and uptake.
Mix your normal nutrients solution and then add 10-15ml LIQUID UNDERGROUND per gallon of nutrient reservoir.
Add 10-20ml per gallon of water to your normal nutrient solution.
Add 10-15ml per gallon of water. Spray directly on plants during the evening or when lights are off.
For optimal results add LIQUID UNDERGROUND to your standard Humboldt Nutrients feeding schedule.
Derived from: Bat Guano, Earth worm castings, and kelp.