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

The Silver Bullet That Wasn’t: Glyphosate’s Declining Weed Control Over 25 Years

  February 20, 2024   Grow IWM
The following is reprinted from University of Illinois’ ACES News. It has been a quarter century since corn and soybeans...
  News From Other Sources      Herbicide Resistance      Industry News      Herbicide Resistant Weeds   

Cover Crops and Weed Control in the Southeast: A Battle for Resources

  February 13, 2024   Grow IWM
You can’t keep a Southern weed down for long.  That’s the takeaway from a recently published meta-analysis of cover...
  Herbicide Resistant Weeds      Cover Crops      Prevention      Grow News      Industry News   

Testing for Herbicide Resistance: A Look at Montana State’s Options

  February 6, 2024   Grow IWM
When a herbicide stops killing a weed, farmers are left with a lot of questions. Is it herbicide resistance? Will other...
  Herbicide Resistance      Grow News      Herbicide Resistant Weeds      News From Other Sources   

New Herbicide-Tolerant Traits Could Boost Sorghum’s Rotational Benefits

  January 30, 2024   Grow IWM
Sorghum can be a great rotational crop option. It’s well suited to marginal soils, less drought-sensitive than corn, and can...
  Prevention      Industry News      Herbicide Resistant Weeds   

Cover Crops for Weed Control: The Keys for Success

  January 23, 2024   Grow IWM
Just like any other crop, winter weeds can outcompete a cover crop if that cover crop has poor germination or establishment. So...
  Cover Crops      Prevention      Industry News      Herbicide Resistant Weeds      News From Other Sources   

The Hunt to Make Cereal Rye More Competitive Above & Below Ground

  January 16, 2024   Grow IWM
There are a lot of ways to keep a weed seed down with cover crops. Above ground, you can rob them of the light, temperatures,...
  Grow News      Industry News      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

New Year, New Weedy Wisdom

  January 9, 2024   Grow IWM
The world is another year older, and its weeds are another year wiser. So what better way to jumpstart your New Year’s...
  News From Other Sources      Prevention      Grow News      Industry News      Herbicide Resistant Weeds   

How to Make Cover Crops Work in Montana

  January 2, 2024   Grow IWM
Water is a precious commodity in Montana cropping and livestock systems, where annual rainfall amounts can range from 6 to 22...
  Industry News      News From Other Sources      Cover Crops      Grow News   

New Resource Alert: The Weed Management Planner

  December 19, 2023   Grow IWM
Creating a better weed control strategy just got a little easier! GROW’s newest resource, the Weed Management Planner, is...
  Herbicide Resistant Weeds      Prevention      Mechanical Weed Control      Cover Crops      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management   

Farmer Forum Recap: Using Seed Impact Mills for Weed Control

  December 12, 2023   Grow IWM
In GROW’s last Farmer Forum of 2023, a panel of farmers from Texas and Washington shared their experiences using seed impact...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control   

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

  December 5, 2023   Grow IWM
Imagine a weed management system with no access to herbicides and no conventional tillage implements. Intimidated? Welcome to the...
  Weed Electrocution      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops   

Making Chaff Lining Work on Shepherd Grain Farms

  November 28, 2023   Grow IWM
John Shepherd is no stranger to integrated weed management. The Virginia farmer already uses cover crops and herbicides to battle...
  Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Cover Crops and Weed Control in the Southeast: A Battle for Resources

  February 13, 2024   Grow IWM
You can’t keep a Southern weed down for long.  That’s the takeaway from a recently published meta-analysis of cover...
  Herbicide Resistant Weeds      Cover Crops      Prevention      Grow News      Industry News   

Cover Crops for Weed Control: The Keys for Success

  January 23, 2024   Grow IWM
Just like any other crop, winter weeds can outcompete a cover crop if that cover crop has poor germination or establishment. So...
  Cover Crops      Prevention      Industry News      Herbicide Resistant Weeds      News From Other Sources   

The Hunt to Make Cereal Rye More Competitive Above & Below Ground

  January 16, 2024   Grow IWM
There are a lot of ways to keep a weed seed down with cover crops. Above ground, you can rob them of the light, temperatures,...
  Grow News      Industry News      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

How to Make Cover Crops Work in Montana

  January 2, 2024   Grow IWM
Water is a precious commodity in Montana cropping and livestock systems, where annual rainfall amounts can range from 6 to 22...
  Industry News      News From Other Sources      Cover Crops      Grow News   

New Resource Alert: The Weed Management Planner

  December 19, 2023   Grow IWM
Creating a better weed control strategy just got a little easier! GROW’s newest resource, the Weed Management Planner, is...
  Herbicide Resistant Weeds      Prevention      Mechanical Weed Control      Cover Crops      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management   

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

  December 5, 2023   Grow IWM
Imagine a weed management system with no access to herbicides and no conventional tillage implements. Intimidated? Welcome to the...
  Weed Electrocution      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops   

The Latest on Herbicide Resistance & Weed Management in Montana

  October 31, 2023   Grow IWM
GROW recently caught up with Montana State University weed scientists, Dr. Tim Seipel and Dr. Lovreet Shergill, for a deep dive...
  Industry News      Integrated Weed Management Innovations      Mechanical Weed Control      Cover Crops      Herbicide Resistant Weeds      Harvest Weed Seed Management   

Interseeding Cover Crops in Corn: A Research Deep Dive

  October 17, 2023   Grow IWM
Interseeding cover crops into standing corn can help growers avoid the hustle and delays of harvest season and give their covers...
  Cover Crops      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

EPA Tours Maryland Crops & Weeds Research  

  October 9, 2023   Grow IWM
In its continuing quest to keep regulators connected with current farming practices, the Weed Science Society of America (WSSA),...
  Mechanical Weed Control      News From Other Sources      Cover Crops      Grow News      featured      Herbicide Resistant Weeds   

Weed Control Remains a Primary Goal for Cover Crop Users

  September 21, 2023   Grow IWM
The numbers are in, and weed control remains one of farmers’ primary – and most successful – goals for adding cover crops...
  Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

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

  August 29, 2023   Grow IWM
A thick stand of cover crops can help suppress weeds, but it can also intercept residual herbicides sprayed in the spring to...
  Grow News      Integrated Weed Management Innovations      Cover Crops   

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

  August 22, 2023   Grow IWM
Cover crop seeding is often the last box to check in the fall for farmers, and planting windows don’t always cooperate. ...
  Prevention      Industry News      Integrated Weed Management Innovations      Cover Crops   

Cover Crops and Weed Control in the Southeast: A Battle for Resources

  February 13, 2024   Grow IWM
You can’t keep a Southern weed down for long.  That’s the takeaway from a recently published meta-analysis of cover...
  Herbicide Resistant Weeds      Cover Crops      Prevention      Grow News      Industry News   

Testing for Herbicide Resistance: A Look at Montana State’s Options

  February 6, 2024   Grow IWM
When a herbicide stops killing a weed, farmers are left with a lot of questions. Is it herbicide resistance? Will other...
  Herbicide Resistance      Grow News      Herbicide Resistant Weeds      News From Other Sources   

The Hunt to Make Cereal Rye More Competitive Above & Below Ground

  January 16, 2024   Grow IWM
There are a lot of ways to keep a weed seed down with cover crops. Above ground, you can rob them of the light, temperatures,...
  Grow News      Industry News      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

New Year, New Weedy Wisdom

  January 9, 2024   Grow IWM
The world is another year older, and its weeds are another year wiser. So what better way to jumpstart your New Year’s...
  News From Other Sources      Prevention      Grow News      Industry News      Herbicide Resistant Weeds   

How to Make Cover Crops Work in Montana

  January 2, 2024   Grow IWM
Water is a precious commodity in Montana cropping and livestock systems, where annual rainfall amounts can range from 6 to 22...
  Industry News      News From Other Sources      Cover Crops      Grow News   

New Resource Alert: The Weed Management Planner

  December 19, 2023   Grow IWM
Creating a better weed control strategy just got a little easier! GROW’s newest resource, the Weed Management Planner, is...
  Herbicide Resistant Weeds      Prevention      Mechanical Weed Control      Cover Crops      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management   

Farmer Forum Recap: Using Seed Impact Mills for Weed Control

  December 12, 2023   Grow IWM
In GROW’s last Farmer Forum of 2023, a panel of farmers from Texas and Washington shared their experiences using seed impact...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control   

Making Chaff Lining Work on Shepherd Grain Farms

  November 28, 2023   Grow IWM
John Shepherd is no stranger to integrated weed management. The Virginia farmer already uses cover crops and herbicides to battle...
  Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Eastern Shore Farmer Tries Chaff Lining to Defeat Weeds

  November 21, 2023   Grow IWM
Third time is usually the charm, but it only took two tries for farmer Jarrett Sturgis to declare chaff lining a likely success...
  Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

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

  November 17, 2023   Grow IWM
GROW will be hosting a Farmer Forum on December 4th, 2023, at 1 p.m. ET. Listen in as three U.S. farmers explain why they decided...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management      Prevention   

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

  November 7, 2023   Grow IWM
Downy brome is a weed so famous for stealing wheat yields that the pioneers dubbed it “cheatgrass,” when they first...
  Herbicide Resistant Weeds      News From Other Sources      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

Hiring Announcement: Precision Sustainable Agriculture

  November 6, 2023   Grow IWM
GROW’s partner organization, Precision Sustainable Agriculture (PSA), is hiring! PSA is a network of scientists and digital...
  DIGITAL AGRICULTURE      Precision Weed Management      Grow News      Industry News   

The Silver Bullet That Wasn’t: Glyphosate’s Declining Weed Control Over 25 Years

  February 20, 2024   Grow IWM
The following is reprinted from University of Illinois’ ACES News. It has been a quarter century since corn and soybeans...
  News From Other Sources      Herbicide Resistance      Industry News      Herbicide Resistant Weeds   

Cover Crops and Weed Control in the Southeast: A Battle for Resources

  February 13, 2024   Grow IWM
You can’t keep a Southern weed down for long.  That’s the takeaway from a recently published meta-analysis of cover...
  Herbicide Resistant Weeds      Cover Crops      Prevention      Grow News      Industry News   

Testing for Herbicide Resistance: A Look at Montana State’s Options

  February 6, 2024   Grow IWM
When a herbicide stops killing a weed, farmers are left with a lot of questions. Is it herbicide resistance? Will other...
  Herbicide Resistance      Grow News      Herbicide Resistant Weeds      News From Other Sources   

New Herbicide-Tolerant Traits Could Boost Sorghum’s Rotational Benefits

  January 30, 2024   Grow IWM
Sorghum can be a great rotational crop option. It’s well suited to marginal soils, less drought-sensitive than corn, and can...
  Prevention      Industry News      Herbicide Resistant Weeds   

Cover Crops for Weed Control: The Keys for Success

  January 23, 2024   Grow IWM
Just like any other crop, winter weeds can outcompete a cover crop if that cover crop has poor germination or establishment. So...
  Cover Crops      Prevention      Industry News      Herbicide Resistant Weeds      News From Other Sources   

The Hunt to Make Cereal Rye More Competitive Above & Below Ground

  January 16, 2024   Grow IWM
There are a lot of ways to keep a weed seed down with cover crops. Above ground, you can rob them of the light, temperatures,...
  Grow News      Industry News      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

New Year, New Weedy Wisdom

  January 9, 2024   Grow IWM
The world is another year older, and its weeds are another year wiser. So what better way to jumpstart your New Year’s...
  News From Other Sources      Prevention      Grow News      Industry News      Herbicide Resistant Weeds   

New Resource Alert: The Weed Management Planner

  December 19, 2023   Grow IWM
Creating a better weed control strategy just got a little easier! GROW’s newest resource, the Weed Management Planner, is...
  Herbicide Resistant Weeds      Prevention      Mechanical Weed Control      Cover Crops      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management   

Farmer Forum Recap: Using Seed Impact Mills for Weed Control

  December 12, 2023   Grow IWM
In GROW’s last Farmer Forum of 2023, a panel of farmers from Texas and Washington shared their experiences using seed impact...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control   

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

  December 5, 2023   Grow IWM
Imagine a weed management system with no access to herbicides and no conventional tillage implements. Intimidated? Welcome to the...
  Weed Electrocution      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops   

Making Chaff Lining Work on Shepherd Grain Farms

  November 28, 2023   Grow IWM
John Shepherd is no stranger to integrated weed management. The Virginia farmer already uses cover crops and herbicides to battle...
  Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Eastern Shore Farmer Tries Chaff Lining to Defeat Weeds

  November 21, 2023   Grow IWM
Third time is usually the charm, but it only took two tries for farmer Jarrett Sturgis to declare chaff lining a likely success...
  Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

New Resource Alert: The Weed Management Planner

  December 19, 2023   Grow IWM
Creating a better weed control strategy just got a little easier! GROW’s newest resource, the Weed Management Planner, is...
  Herbicide Resistant Weeds      Prevention      Mechanical Weed Control      Cover Crops      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Harvest Weed Seed Management   

Farmer Forum Recap: Using Seed Impact Mills for Weed Control

  December 12, 2023   Grow IWM
In GROW’s last Farmer Forum of 2023, a panel of farmers from Texas and Washington shared their experiences using seed impact...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control   

Making Chaff Lining Work on Shepherd Grain Farms

  November 28, 2023   Grow IWM
John Shepherd is no stranger to integrated weed management. The Virginia farmer already uses cover crops and herbicides to battle...
  Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

Eastern Shore Farmer Tries Chaff Lining to Defeat Weeds

  November 21, 2023   Grow IWM
Third time is usually the charm, but it only took two tries for farmer Jarrett Sturgis to declare chaff lining a likely success...
  Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

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

  November 17, 2023   Grow IWM
GROW will be hosting a Farmer Forum on December 4th, 2023, at 1 p.m. ET. Listen in as three U.S. farmers explain why they decided...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management      Prevention   

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

  November 7, 2023   Grow IWM
Downy brome is a weed so famous for stealing wheat yields that the pioneers dubbed it “cheatgrass,” when they first...
  Herbicide Resistant Weeds      News From Other Sources      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

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

  October 24, 2023   Grow IWM
The following is reprinted from Penn State Extension. Due to dry conditions early in the production season, we are seeing more...
  Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Industry News      Prevention      Harvest Weed Seed Control   

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

  October 3, 2023   Grow IWM
Mark Greene’s fields only see 10 to 12 inches of rain on his farm in Asotin County, a flat, semiarid section of the Palouse...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Prevention      Grow News   

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

  September 28, 2023   Grow IWM
Killing weed seeds is dirty work, but with herbicide-resistant weeds on the rise, someone has to do it! That’s why Virginia...
  Prevention      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control   

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

  September 26, 2023   Grow IWM
There’s a new tool at work in the fields of JIG Farms – a seed impact mill.  Owned and operated by Simon Crawford, JIG...
  Mechanical Weed Control      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

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

  September 19, 2023   Grow IWM
Dale and Nick Druffel farm almost 2,800 acres near Uniontown, WA, in the beautiful rolling hills of the Palouse Region. As...
  Herbicide Resistant Weeds      Mechanical Weed Control      Prevention      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

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

  September 12, 2023   Grow IWM
The Palouse region is the heartland of the inland Pacific Northwest (PNW), covering the stunningly beautiful landscapes of...
  Herbicide Resistant Weeds      Harvest Weed Seed Management      Grow News      Industry News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

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.

Prevention Cultural Chemical Biological Mechanical IWM

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:

In the Fields

What Are Your Problem Weeds?

Redroot & Smooth Pigweed
Texas Panicum
Canada Thistle
Common Pokeweed
Mustard Species in Wheat
Rush Skeletonweed
Russian Thistle
Prickly Lettuce
Mayweed Chamomile
Field Bindweed
Common Barberry