Uses for Cornmeal in the Garden

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Weeds are the uninvited party guests of the garden world. Cornmeal can be the bouncer, but in a weirdly polite way. Corn gluten meal (a fancy cousin of regular cornmeal) stops weed seeds from sprouting—it’s a pre-emergent herbicide.

Think of it as a subtle “no vacancy” sign for seeds. You sprinkle it on the soil in early spring, before weeds pop up, and it creates a barrier that prevents their roots from growing. Note: this also stops good seeds from sprouting, so don’t use it where you’re planting carrots or lettuce from seed.

Cornmeal: The Gardener's Secret Weapon – 5 Simple Uses in the Garden

But for established flower beds or pathways? It’s a game-changer. You’re basically telling crabgrass, “Sorry, the club is full,” without poisoning the earth. Pretty cool, huh?