The Espoma 4 lb. 66 sq. ft. Bulb-Tone Organic Bulb and Flower Food is the ultimate organic plant food for all spring and fall bulbs. It's a rich blend of the finest natural and organic ingredients and enhanced with humates and beneficial microbes. No sludges or fillers are ever used, and because it's made in our state-of-the-art solar powered manufacturing facility, consistency and quality are guaranteed. The 66 sq. ft. of coverage provides enough bulb tone to cover and feed your entire yard, and this fertilizer is best used for bigger and more colorful blooms.