· timing for optimal weed control. Application should align with soil temperature and the growth cycles of weeds you want to prevent. Corn gluten meal should be applied to your lawn before weed seeds germinate in the spring and fall , acting as a pre-emergent herbicide to prevent their growth. Apply it in mid-march to early april , at least three to five weeks before the crabgrass seeds germinate. · master the exact soil temperature and timing needed to activate corn gluten meal for maximum pre-emergent weed control and natural fertilization. As the soil begins to warm in late winter is the correct time to apply corn gluten. This means that applications must be very carefully timed. Proper timing of the application is critical for good weed control. Especially with sandburs, multiple applications may be necessary. Corn gluten may be applied every 6 weeks through september. · for effective weed control, timing your cgm application is critical. · corn gluten does not prevent weed seeds from germinating, but it does inhibit those seeds from forming roots after germination. · this guide walks you through when to apply corn gluten meal, how to use it properly, and the do’s and don’ts that make all the difference between success and frustration.
