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Humic Acid Potassium Humate Fertilizer From Leonardite. 100% Water Solubility: Instantly dissolves in water with anti-hard water and deflocculation features. Versatile Application: Suitable for foliar spray, water flushing, and drip irrigation for all plants. Boosts Plant Immunity: Acts as a natural plant vaccine to improve plant immunity and absorption. Cost-Effective Efficiency: Long fertilizer efficiency reduces application amount and lowers production costs. Certified Quality: Manufactured under ISO9001 and ISO certification standards for reliability.