Down To Earth Organic Corn Weed Blocker 9-1-0 Pre-Emergent Weed Suppressant, 50-Pound A pre-emergent weed suppressant, stops new weeds from growing in established lawns, vegetable gardens and flower beds Acts as a slow release fertilizer due to its 9% Nitrogen content. Completely natural product which is harmless to people, pets and ground water. Carefully blended from organic nutrients in the ideal proportions without the use of synthetics, growth stimulants or low quality fillers Highest quality ingredients help provide an effective and environmentally friendly approach to plant care, crop fertilization and soil management