Grow More Mendocino Avalanche is a flower hardener specially developed to stimulate flower development in the final bloom stage. It has been field tested in the Mendocino and Trinity Counties in Northern California and proven to increase the size and mass of flowers. This is an excellent product for florists! Grow More Mendocino Avalanche contains Norwegian kelp extract, which supplies organic carbon, amino acids and carbohydrates to most flowering plants. It can be used in hydroponic, indoor, outdoor, grown in container or field grown applications. Lastly, it can also be applied by itself or in combination with other fertilizer or nutrient product. Quantity: 1 Gallon.