The Espoma 4 lb. 66 sq. ft. Berry-Tone Organic Fruit and Berry Tone is the ultimate plant food for blueberries, strawberries and raspberries. 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 berry tone to cover and feed your entire yard, and this fertilizer is best used for and abundant and flavorful fruit harvest.