Did you know that berries are not only delicious, they are one of the healthiest foods that you can eat and grow. These nutritional powerhouses are packed with antioxidants, rich in fiber and full of vitamins. We love Espoma's Berry tone for all of our acidic berry plants (strawberries, raspberries, blueberries, etc.).  As with other Espoma products, their Berry Tone fertilizer contains organic ingredients and this formula has a 4-3-4 analysis and includes 5% sulfer (necessary for chlorophyll formation, promoting nodulation in legumes, helps develop and activate certain enzymes and vitamins) . It's a slow release feed that also includes bio tone microbes (bacteria that restore balance in your soil).