What is it?
Corn gluten is a golden yellow powder that is a by-product of corn processing. Corn gluten has been commonly used as a food supplement for dogs, cats, & livestock..

What does it do in the landscape?
Corn gluten is a source of 9% slow-release nitrogen fertilizer AND controls a very extensive number of lawn and garden weeds as they germinate. It is usually effective for 6 to 8 weeks.

Garden Beds
Hand pull existing weeds then apply corn gluten at a rate of 2 pounds per 100 square feet. Reapply whenever the soil is turned.

Apply with a drop spreader set for 40 pounds of corn gluten per 2000 square feet. Water the corn gluten in slightly, and thereafter water as little as possible. Corn gluten appears to have its best effect under dry conditions. Any mowing is best done after the application.


  • Late winter to early spring in our area would be the best time to apply. As the soil warms, usually during the time the daffodils bloom, is the best time to apply (late January to early February).
  • Fall application should be in late September for winter weeds.
  • Weed seeds can germinate anytime of the year, but these two dates for annual application work the best.
  • Use a drop spreader, if possible, set on the smallest opening and walk briskly.
  • Do not apply compost for 6 – 8 weeks after applying corn gluten. It can interfere with the effectiveness of the corn gluten.

Remember that most weeds, in general, prefer a poor soil. Therefore, nourishing the soil with organic fertilizer and good quality compost are basic steps in any weed prevention program.