Corn Gluten Meal: Weed Control, Not Fertilizer

Corn gluten meal (CGM) is primarily a pre‑emergent weed suppressant, not a significant fertilizer. Don't apply to newly seeded areas — it stops all seeds, including vegetables. Wait until transplants (tomatoes, peppers) are established. For fertility, use better organic options (compost, manure, fish emulsion). CGM comes from the corn endosperm (protein fraction).

— The Long Island Gardener