FoxFarm Tiger Bloom 15 Gallon FoxFarm® Tiger Bloom® is an ultra potent, fast acting, high phosphorus fertilizer that also contains a good supply of nitrogen for growth and vigor. It is formulated with a low pH to maintain stability in storage and keep micronutrients available. Tiger Bloom® can be used for both hydroponic and soil applications. When used as directed Tiger Bloom® encourages abundant fruit, flower and multiple bud development. Use Tiger Bloom® at the first signs of flowering through harvest.