Master Nursery® Bumper Crop® Organic Plant Food is specially formulated for use with our Bumper Crop® Grower’s Mix. We combine an exclusive blend of marine residuals with quality organic ingredients that provide your plants with a complete balance of nutrients. Made with lobster, crab, fish, and kelp meal plus worm castings and other important natural ingredients, this exceptional fertilizer will super charge the biological activity of your soil, giving all your plants a significant boost. It is also high in calcium (6%) and a range of macro and micro-nutrients help improve plant vigor! OMRI Listed for organic use.