Improved MaxiBloom plant nutrient is rich in calcium, magnesium, and sulfur to stimulate higher flower and fruiting. Because of MaxiBloom"s higher proportions, you will use less product to achieve higher N-P-K ratings, making MaxiBloom a more cost-effective product. Use MaxiBloom alone during the reproductive growth phase to provide a comprehensive diet for hydroponically or soil grown plants. NPK Formula: 5-15-14.