Got a patch of powdery mildew on your zucchinis? Or maybe your tomatoes look a little sad and spotty? Cornmeal can act as a natural fungicide, and it’s shockingly effective.
You don’t need harsh chemicals. Just sprinkle dry cornmeal right onto the soil around the base of your plants—it feeds beneficial microbes that literally eat the bad fungi. It’s like sending a tiny army of good bacteria to a food fight, and the bad guys always lose.
You can also make a spray: mix a cup of cornmeal with a gallon of water, let it sit for an hour, strain it, and spritz your leaves. It’s not a magic bullet, but for mild outbreaks, it’s surprisingly soothing—like a gentle, earthy aspirin for your plants.
