The Sanctuary 3-3-4 Standard Grade Natural Based Biofertilizer 25 lb Bag is an all-natural based biological fertilizer for a wide range of landscape installation and maintenance applications. This product contains energy rich organic fertilizer components that naturally deliver the NPK nutrients to the plant. This product provides a slow, non-burning nutrient release that aids with root regeneration and plant establishment at time of installation. Plus, this product is an excellent maintenance product for annual & perennial flowers, ground covers and ornamental trees & shrubs in foundation and color beds. Lastly, this product contains a broad group of beneficial soil bacteria and fungi to enhance biological soil activity to aid with the release of these organic nutrient ingredients.