Better Gro orchid bloom booster 20-14-13 1lb is a urea-free, professionally formulated fertilizer, containing high content phosphorous powerful blooming agent. This secret formula was developed by our own master growers and is used in our greenhouses to accelerate flowering, enhance bloom color and maximize bloom size. It provides the precise mix of ingredients and nutrients your orchids need to produce beautiful, vibrant and long-lasting blooms. Use this fertilizer at every 4th watering. Use one teaspoon per gallon of water, thoroughly soaking both the orchids root system and foliage. For normal fertilization of your orchids, use this fertilizer as directed. This product weight 16 ounces.