For the pros. 4% Humic Acid 2.5% Fulvic Acid. Dirt MD is available in quarts $20 or 5 gallon jugs. We just grabbed a case of quarts for anyone looking to try it out. Published November 16, 2014 at 640 × 640 in For the pros. 4% Humic Acid 2.5% Fulvic Acid. Dirt MD is available in quarts $20 or 5 gallon jugs. We just grabbed a case of quarts for anyone looking to try it out. ← Previous Next →
