Organic, All-Natural & Non-GMO Sourced Strawberry Fertilizer (4-5-5). The Urban Farmer Strawberry Fertilizer is guaranteed to increase yields, size, health and vigor of your strawberry plants. This 4-5-5 (NPK) fertilizer ratio provides the Nitrogen your strawberries need in the spring and the Phosphate and Potash to produce high yields of large fruits in the summer. The fertilizer also contains several other beneficial vitamins, minerals and microbes for plant and soil health. Directions: Spread 2 tablespoons of strawberry fertilizer (4-5-5) around each plant in spring when plants begin to show signs of growth. Apply a second application of 2 tablespoons when plant begins to fruit. 1 lb. will feed 5 strawberry plants for an entire season. How much strawberry fertilizer do I need? 15 Strawberry Plants: 3 lbs 30 Strawberry Plants: 6 lbs 120 Strawberry Plants: 24 lbs Derived from: Fish Bone Meal, Gypsum, Blood Meal, Alfalfa Meal, Sulfate of Potash & Feather Meal. Guaranteed Analysis: Total Nitrogen (N) ..................... 4.00% Available Phosphate (P2O5)..... 5.00% Soluble Potash (K2O) ............... 5.00% Calcium (Ca) ............................. 12.10%