Miracle-Gro Water Soluble Bloom Booster Flower Food has been formulated to produce big blooms and vibrant colorsThis fertilizer for flowers is safe to use on all types of annual and perennial flowersStarts to work instantly, promoting quick, beautiful resultsApply using a Miracle-Gro Garden Feeder, or any watering can, every 7-14 daysFeeds approximately 2,200 sq. ft. of garden area