Marine Phytoplankton Liquid Soil Enhancer 16.9 oz + CALMAG Corrects calcium and magnesium deficiencies to prevent blossom end rot and weak growth. Supports strong cell development and improved nutrient absorption. Ideal for vegetables, flowers, succulents, bamboo, and houseplants. Works in soil, hydroponics, coco coir, raised beds, and containers. Organic Cal-Mag plant supplement for clean and effective nutrition.