The price of potassium humate varies depending on the quality, form (liquid, powder, granules), and supplier. As of the most recent data, the price ranges from $1.50 to $4 per kilogram for bulk orders. High-quality, highly concentrated potassium humate products, such as those with 98% purity, are typically on the higher end of this range. Prices also fluctuate based on the source (domestic or international) and shipping costs. For smaller retail purchases, prices may be higher per kilogram.