Open2
Q.

herbicide in vegetable gardens

Zone 49423 | pamsgarden added on February 20, 2017 | Answered

Can cornmeal be used as a herbicide in early spring as a pre-treat for a vegetable garden? How long does it "linger"? And will it inhibit my vegetables when planting season arrives?

A.
A.Answers to this queston: Add Answer
Alisma
Certified GKH Gardening Expert
Answered on February 20, 2017

Cornmeal gluten, aka corn gluten meal, can be used to inhibit seed germination, but it won't kill growing plants. So, one way to use it would be to plant your garden and allow your seeds to germinate, then apply corn gluten meal to prevent any further weed seeds from germinating. Regular cornmeal has a different composition and won't work. This article provides the details:
https://www.gardeningknowhow.com/special/organic/cornmeal-in-the-garden.htm

As this article explains, some garden seeds will be more damaged than others:
https://hortnews.extension.iastate.edu/1997/6-20-1997/cornglut.html

Also, excessive moisture seems to reduce its effectiveness, so if you can rely on a couple good rains before you plant your garden, it probably wouldn't inhibit your garden seeds very much.

00
Was this answer useful?

Log in or sign up to help answer this question.
Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Open2
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert

Learn More