About this item Start with Grow Big for abundant green growth Switch to Tiger Bloom at the first sign of bud set or flowering Use Big Bloom throughout all growing cycles to heal root systems and increase nutrient cycling Ideal for mature, late-season flowers and fruit Start with Grow Big for abundant green growth. Switch to Tiger Bloom at the first sign of bud set or flowering. Use Big Bloom throughout all growing cycles to heal root systems and increase nutrient cycling.