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Corn Gluten Meal: The Organic Pre-Emergent You Haven't Heard Of

Corn gluten meal (CGM), discovered at Iowa State, prevents seed germination—perfect for crabgrass and annual weeds. Apply in early spring (forsythia bloom) and again in fall. Brands: Wow!, Wow! Plus (with fertilizer), GreenEarth, Jonathan Green, Bioscape. Why unknown? Small ad budgets vs. Scotts' millions. CGM is safe, organic, and builds soil nitrogen. Works only on seeds, not established weeds.

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