Getting Rid Of Weeds
Through Integrated Weed Management
We are a scientist-led network coordinating research to help farmers across the U.S. fight herbicide-resistance with a greater diversity of weed control strategies to complement chemical use.
GROW aims to provide information on tools such as cover crops, increased crop competition, harvest weed seed control, and more.
Recent GROW News & Research Updates

New Penn State Guide Tackles Weed Control in Organic No-Till Soybean Systems

Making Chaff Lining Work on Shepherd Grain Farms

Eastern Shore Farmer Tries Chaff Lining to Defeat Weeds

Join a GROW Farmer Forum on Using Seed Impact Mills for Weed Control

Narrow Soybean Rows: How to Manage Both Weeds & White Mold

Cheatgrass (Downy Brome) Management in the Western U.S.

Hiring Announcement: Precision Sustainable Agriculture

The Latest on Herbicide Resistance & Weed Management in Montana

Scout for Palmer Amaranth and Waterhemp to Prevent Spreading Seeds with the Combine

Interseeding Cover Crops in Corn: A Research Deep Dive

EPA Tours Maryland Crops & Weeds Research

HWSC in the Pacific Northwest: Greene Ridge Farms Tackles Tough Weeds with Seed Impact Mill

New Penn State Guide Tackles Weed Control in Organic No-Till Soybean Systems

The Latest on Herbicide Resistance & Weed Management in Montana

Interseeding Cover Crops in Corn: A Research Deep Dive

EPA Tours Maryland Crops & Weeds Research

Weed Control Remains a Primary Goal for Cover Crop Users

The Hunt to Learn How Much Herbicide is Intercepted by a Cover Crop

Should You Adjust Cover Crop Seeding Rates as Planting Dates Change?

Planting Fall Covers? Know Your Herbicide Carryover Risks.

Farmer Forum Recap: Cover Crop Seeding

The Cover Crop That Never Dies: Scientists Explore Living Mulch

Join a GROW Farmer Forum on Cover Crop Seeding

Farmer Case Study: Using Wheat as a Cover Crop & Managing Nitrogen Tie-Up

Making Chaff Lining Work on Shepherd Grain Farms

Eastern Shore Farmer Tries Chaff Lining to Defeat Weeds

Join a GROW Farmer Forum on Using Seed Impact Mills for Weed Control

Cheatgrass (Downy Brome) Management in the Western U.S.

Hiring Announcement: Precision Sustainable Agriculture

EPA Tours Maryland Crops & Weeds Research

HWSC in the Pacific Northwest: Greene Ridge Farms Tackles Tough Weeds with Seed Impact Mill

A Weed Seed Killing Machine: Testing the Redekop Seed Control Unit

HWSC in the Pacific Northwest: Simon Crawford’s First Year with a Seed Impact Mill

HWSC in the Pacific Northwest: Druffel Farms Adds a Seed Impact Mill to Manage Weeds

HWSC in the Pacific Northwest: Farmers Lead the Way in this Series

The Hunt to Learn How Much Herbicide is Intercepted by a Cover Crop

New Penn State Guide Tackles Weed Control in Organic No-Till Soybean Systems

Making Chaff Lining Work on Shepherd Grain Farms

Eastern Shore Farmer Tries Chaff Lining to Defeat Weeds

Join a GROW Farmer Forum on Using Seed Impact Mills for Weed Control

Narrow Soybean Rows: How to Manage Both Weeds & White Mold

Cheatgrass (Downy Brome) Management in the Western U.S.

The Latest on Herbicide Resistance & Weed Management in Montana

Scout for Palmer Amaranth and Waterhemp to Prevent Spreading Seeds with the Combine

Interseeding Cover Crops in Corn: A Research Deep Dive

EPA Tours Maryland Crops & Weeds Research

HWSC in the Pacific Northwest: Greene Ridge Farms Tackles Tough Weeds with Seed Impact Mill

A Weed Seed Killing Machine: Testing the Redekop Seed Control Unit

Making Chaff Lining Work on Shepherd Grain Farms

Eastern Shore Farmer Tries Chaff Lining to Defeat Weeds

Join a GROW Farmer Forum on Using Seed Impact Mills for Weed Control

Cheatgrass (Downy Brome) Management in the Western U.S.

Scout for Palmer Amaranth and Waterhemp to Prevent Spreading Seeds with the Combine

HWSC in the Pacific Northwest: Greene Ridge Farms Tackles Tough Weeds with Seed Impact Mill

A Weed Seed Killing Machine: Testing the Redekop Seed Control Unit

HWSC in the Pacific Northwest: Simon Crawford’s First Year with a Seed Impact Mill

HWSC in the Pacific Northwest: Druffel Farms Adds a Seed Impact Mill to Manage Weeds

HWSC in the Pacific Northwest: Farmers Lead the Way in this Series

Chaff Lining Limits Weed Seed Spread at Harvest, Research Finds

Is it Time to Consider Harvest Weed Seed Control?

No Seeds. No Weeds.
For over 50 years, herbicides have been a highly effective method to control weeds and protect crop yields. Herbicides have supported the widespread use of no-till and limited cultivation for weed control, improving soil health. However, overreliance on a few key herbicides has prompted a growing epidemic of herbicide-resistant weeds.
For some farmers, herbicides alone just aren’t getting the job done anymore.
Integrated Weed Management (IWM) is the answer.
What is Integrated Weed Management?
Integrated weed management (IWM) is a system that layers multiple weed control methods to suppress and manage weeds across a growing season, by targeting weeds and the seedbank in different ways and at different stages of development. The result is a robust weed management program that doesn’t rely on a single mode of action or management tactic. IWM techniques include:
