About This Fox Farm Sledgehammer Flush encourages water flow through both soil and soilless media FLUSH OUT NUTRIENT BLOCKAGES: FoxFarm Sledgehammer is a unique rinse formula designed to eliminate fertilizer buildup that can cause nutrient lockout. Flushing out excess mineral salts, it helps your plants access the nutrients they need PLANT-BASED ORGANIC FORMULA: Derived from saponins extracted from the Yucca schidigera plant, Fox Farm Sledgehammer is designed for use in organic gardening EFFORTLESS FEEDING FOR PLANTS: For in-ground and container plants, mix 2 teaspoons per gallon of water and drench the soil every 3-4 weeks. For hydroponic systems, simply add 2 drops per gallon of water and flush your system during each reservoir change RELIABILITY YOU CAN TRUST: FoxFarm has been producing top-quality fertilizers and plant foods since 1984. Each formula is greenhouse tested for consistency, ensuring you get the best results every time Overview Brand : FoxFarm Item Weight : 16 ounces Item Form : Liquid Liquid Volume : 1 Quarts Specific Uses For Product : General Plant Use