Due to extreme weather, the Flinn Warehouse is not shipping today, 1/23/2026. We expect to resume normal shipping on Monday, 1/26/2026. We regret this inconvenience. For more information, please call us at 800-452-1261.
Time Release Fertilizer for biology and life science is applied only once a year provides gentle continuous feeding with no risk of root burn. Will feed up to 80 average “house” plants for a full year.
Applied only once a year, this slow release fertilizer provides gentle continuous feeding with no risk of root burn. 24-4-8 formulation provides sulfur coated urea (N), polymer-coated potassium (K), and plant-available phosphorus (P). Will support initial and continued growth of indoor or outdoor plants. Sixteen-ounce package will feed 80 average “house” plants for a full year. Includes measuring spoon and application instructions.