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

Keep These Tips in Mind When Using Target Sprayers 

  April 22, 2025   Grow IWM
Precision spray tech is everywhere, each brand and model boasting an array of bells and whistles. But despite all of their...
  Grow News      Herbicide Resistant Weeds      Herbicide Resistance      Precision Weed Management      Herbicide Management   

Heading to the Field to Scout? Take Us With You!

  April 17, 2025   Grow IWM
As you head into the field to scout early season weeds, remember to keep GROW’s scouting resources handy! Remember the...
  Grow News      Herbicide Resistant Weeds      Prevention      Fact Sheets      Take Action   

A Handheld Extension Agent? GROW Researchers Put ExtensionBot to the Test

  April 15, 2025   Grow IWM
AI is sowing new possibilities in agriculture, from precision herbicide applications to mapping weeds and cover crops in fields....
  Grow News      Industry News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops      DIGITAL AGRICULTURE      Herbicide Management   

Insecticides May Contribute to Bigger Problems with Certain Weeds

  April 10, 2025   Grow IWM
This article is reprinted with permission from Penn State University. Insecticides may help growers hoping to protect their crops...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      Herbicide Management   

Rising Herbicide Resistance: Researchers Find That No State or Weed is Immune

  April 8, 2025   Grow IWM
“If we look for it, we find it.”  Mark VanGessel, University of Delaware In 2022, when North Dakota farmers began...
  Grow News      Herbicide Resistant Weeds      Herbicide Resistance      Herbicide Management   

Take Action Has a New Home on GROW Website

  April 1, 2025   Grow IWM
The Take Action (Herbicide-Resistance Management) program is moving to a new home! You can now find it on the GROW (Getting Rid...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Herbicide Management      Take Action   

The Lowdown on Roller Crimpers

  March 27, 2025   Grow IWM
Editor’s Note: This video was first published on April 2, 2024 Roller crimpers can be a valuable tool for terminating cover...
  Grow News      Integrated Weed Management Innovations      Mechanical Weed Control      Cover Crops   

Listen In: A Look at Targeted Tillage with the Weed Chipper

  March 25, 2025   Grow IWM
Never underestimate the power of a single, well-placed kick. That’s how an innovative targeted tillage venture began in...
  Industry News      Herbicide Resistant Weeds      Mechanical Weed Control      Precision Weed Management   

Farmer Forum Recap: Cover Crop Termination

  March 20, 2025   Grow IWM
Editor’s Note: This Farmer Forum was recorded in March 2023. In this GROW Farmer Forum, a panel of farmers from Wisconsin,...
  Grow News      Cover Crops      featured   

Squash Pigweeds With These Cover Crop Management Strategies

  March 18, 2025   Grow IWM
Palmer amaranth, waterhemp, smooth and redroot pigweed – these weeds haunt farmers nationwide, causing crop yield losses as...
  Grow News      Herbicide Resistant Weeds      Cover Crops   

A Look at Planter Adjustments for Planting into Cover Crops

  March 13, 2025   Grow IWM
Editor’s Note: This article was first published on March 26, 2024.  When adjusting your planter to run through...
  Grow News      Integrated Weed Management Innovations      Cover Crops   

How to Manage Cereal Rye in the Upper Midwest for Weed Suppression and Max Yields

  March 11, 2025   Grow IWM
Weeds don’t stand a chance…if you time it right. New research is finally providing much-needed data to upper Midwest farmers...
  Grow News      Cover Crops      Herbicide Resistance      Herbicide Management   

A Handheld Extension Agent? GROW Researchers Put ExtensionBot to the Test

  April 15, 2025   Grow IWM
AI is sowing new possibilities in agriculture, from precision herbicide applications to mapping weeds and cover crops in fields....
  Grow News      Industry News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops      DIGITAL AGRICULTURE      Herbicide Management   

Insecticides May Contribute to Bigger Problems with Certain Weeds

  April 10, 2025   Grow IWM
This article is reprinted with permission from Penn State University. Insecticides may help growers hoping to protect their crops...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      Herbicide Management   

The Lowdown on Roller Crimpers

  March 27, 2025   Grow IWM
Editor’s Note: This video was first published on April 2, 2024 Roller crimpers can be a valuable tool for terminating cover...
  Grow News      Integrated Weed Management Innovations      Mechanical Weed Control      Cover Crops   

Farmer Forum Recap: Cover Crop Termination

  March 20, 2025   Grow IWM
Editor’s Note: This Farmer Forum was recorded in March 2023. In this GROW Farmer Forum, a panel of farmers from Wisconsin,...
  Grow News      Cover Crops      featured   

Squash Pigweeds With These Cover Crop Management Strategies

  March 18, 2025   Grow IWM
Palmer amaranth, waterhemp, smooth and redroot pigweed – these weeds haunt farmers nationwide, causing crop yield losses as...
  Grow News      Herbicide Resistant Weeds      Cover Crops   

A Look at Planter Adjustments for Planting into Cover Crops

  March 13, 2025   Grow IWM
Editor’s Note: This article was first published on March 26, 2024.  When adjusting your planter to run through...
  Grow News      Integrated Weed Management Innovations      Cover Crops   

How to Manage Cereal Rye in the Upper Midwest for Weed Suppression and Max Yields

  March 11, 2025   Grow IWM
Weeds don’t stand a chance…if you time it right. New research is finally providing much-needed data to upper Midwest farmers...
  Grow News      Cover Crops      Herbicide Resistance      Herbicide Management   

All-of-the-Above Management: Weed Control in Organic Grain Production in the Pacific Northwest

  March 4, 2025   Grow IWM
Demand for organic small grains is increasing, and the semiarid U.S. Pacific Northwest is well-suited to small grain production....
  Integrated Weed Management Innovations      Herbicide Management      Precision Weed Management      DIGITAL AGRICULTURE      Cover Crops      Mechanical Weed Control      Herbicide Resistant Weeds   

Weed Management Planner: Order Your Free Prints Now! 

  February 18, 2025   Grow IWM
GROW’s Weed Management Planner is many things – color-coded, comprehensive, and packed with information!  But we admit,...
  Herbicide Management      Fact Sheets      Cover Crops      Mechanical Weed Control      Integrated Weed Management Innovations      Harvest Weed Seed Control      Grow News   

Farming Peanuts with Cover Crops in Virginia

  February 11, 2025   Grow IWM
“Cover crops” and “peanuts” don’t get used in the same sentence too often. With limited herbicide options available and...
  Cover Crops      Herbicide Resistant Weeds      Integrated Weed Management Innovations      Grow News   

New Technology Aims to Map Cereal Rye Cover Crop Biomass

  February 4, 2025   Grow IWM
Cover crops are becoming an important tool for weed suppression, and their biomass is among the most accurate predictors of how...
  Integrated Weed Management Innovations      Precision Weed Management      DIGITAL AGRICULTURE      Cover Crops   

Penn State Guide Details Interseeding Cover Crops in Corn Production

  January 28, 2025   Grow IWM
Want to introduce cover crops into your farming operation, but are too tight on time in the fall? Interseeding cover crops into...
  Herbicide Management      Fact Sheets      Cover Crops      Herbicide Resistant Weeds   

Keep These Tips in Mind When Using Target Sprayers 

  April 22, 2025   Grow IWM
Precision spray tech is everywhere, each brand and model boasting an array of bells and whistles. But despite all of their...
  Grow News      Herbicide Resistant Weeds      Herbicide Resistance      Precision Weed Management      Herbicide Management   

Heading to the Field to Scout? Take Us With You!

  April 17, 2025   Grow IWM
As you head into the field to scout early season weeds, remember to keep GROW’s scouting resources handy! Remember the...
  Grow News      Herbicide Resistant Weeds      Prevention      Fact Sheets      Take Action   

A Handheld Extension Agent? GROW Researchers Put ExtensionBot to the Test

  April 15, 2025   Grow IWM
AI is sowing new possibilities in agriculture, from precision herbicide applications to mapping weeds and cover crops in fields....
  Grow News      Industry News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops      DIGITAL AGRICULTURE      Herbicide Management   

Rising Herbicide Resistance: Researchers Find That No State or Weed is Immune

  April 8, 2025   Grow IWM
“If we look for it, we find it.”  Mark VanGessel, University of Delaware In 2022, when North Dakota farmers began...
  Grow News      Herbicide Resistant Weeds      Herbicide Resistance      Herbicide Management   

The Lowdown on Roller Crimpers

  March 27, 2025   Grow IWM
Editor’s Note: This video was first published on April 2, 2024 Roller crimpers can be a valuable tool for terminating cover...
  Grow News      Integrated Weed Management Innovations      Mechanical Weed Control      Cover Crops   

Farmer Forum Recap: Cover Crop Termination

  March 20, 2025   Grow IWM
Editor’s Note: This Farmer Forum was recorded in March 2023. In this GROW Farmer Forum, a panel of farmers from Wisconsin,...
  Grow News      Cover Crops      featured   

Squash Pigweeds With These Cover Crop Management Strategies

  March 18, 2025   Grow IWM
Palmer amaranth, waterhemp, smooth and redroot pigweed – these weeds haunt farmers nationwide, causing crop yield losses as...
  Grow News      Herbicide Resistant Weeds      Cover Crops   

A Look at Planter Adjustments for Planting into Cover Crops

  March 13, 2025   Grow IWM
Editor’s Note: This article was first published on March 26, 2024.  When adjusting your planter to run through...
  Grow News      Integrated Weed Management Innovations      Cover Crops   

How to Manage Cereal Rye in the Upper Midwest for Weed Suppression and Max Yields

  March 11, 2025   Grow IWM
Weeds don’t stand a chance…if you time it right. New research is finally providing much-needed data to upper Midwest farmers...
  Grow News      Cover Crops      Herbicide Resistance      Herbicide Management   

Seed Impact Mill Pulverizes Problematic Waterhemp in New Study

  February 25, 2025   Grow IWM
Recently-published research has reinforced that “milling around” with seed impact mills can help keep escaped waterhemp from...
  Mechanical Weed Control      Harvest Weed Seed Management      Herbicide Resistant Weeds      Herbicide Management      Grow News      Harvest Weed Seed Control   

Weed Management Planner: Order Your Free Prints Now! 

  February 18, 2025   Grow IWM
GROW’s Weed Management Planner is many things – color-coded, comprehensive, and packed with information!  But we admit,...
  Herbicide Management      Fact Sheets      Cover Crops      Mechanical Weed Control      Integrated Weed Management Innovations      Harvest Weed Seed Control      Grow News   

Farm Tour in Wisconsin Seeks to Highlights ESA Impacts to Ag

  February 12, 2025   Grow IWM
What do rattlesnakes, cranberries and vegetables have in common? They were all part of a recent farm tour in Wisconsin, aimed at...
  Industry News      News From Other Sources      Herbicide Management      Grow News   

Keep These Tips in Mind When Using Target Sprayers 

  April 22, 2025   Grow IWM
Precision spray tech is everywhere, each brand and model boasting an array of bells and whistles. But despite all of their...
  Grow News      Herbicide Resistant Weeds      Herbicide Resistance      Precision Weed Management      Herbicide Management   

Heading to the Field to Scout? Take Us With You!

  April 17, 2025   Grow IWM
As you head into the field to scout early season weeds, remember to keep GROW’s scouting resources handy! Remember the...
  Grow News      Herbicide Resistant Weeds      Prevention      Fact Sheets      Take Action   

A Handheld Extension Agent? GROW Researchers Put ExtensionBot to the Test

  April 15, 2025   Grow IWM
AI is sowing new possibilities in agriculture, from precision herbicide applications to mapping weeds and cover crops in fields....
  Grow News      Industry News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops      DIGITAL AGRICULTURE      Herbicide Management   

Insecticides May Contribute to Bigger Problems with Certain Weeds

  April 10, 2025   Grow IWM
This article is reprinted with permission from Penn State University. Insecticides may help growers hoping to protect their crops...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      Herbicide Management   

Rising Herbicide Resistance: Researchers Find That No State or Weed is Immune

  April 8, 2025   Grow IWM
“If we look for it, we find it.”  Mark VanGessel, University of Delaware In 2022, when North Dakota farmers began...
  Grow News      Herbicide Resistant Weeds      Herbicide Resistance      Herbicide Management   

Take Action Has a New Home on GROW Website

  April 1, 2025   Grow IWM
The Take Action (Herbicide-Resistance Management) program is moving to a new home! You can now find it on the GROW (Getting Rid...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Herbicide Management      Take Action   

Listen In: A Look at Targeted Tillage with the Weed Chipper

  March 25, 2025   Grow IWM
Never underestimate the power of a single, well-placed kick. That’s how an innovative targeted tillage venture began in...
  Industry News      Herbicide Resistant Weeds      Mechanical Weed Control      Precision Weed Management   

Squash Pigweeds With These Cover Crop Management Strategies

  March 18, 2025   Grow IWM
Palmer amaranth, waterhemp, smooth and redroot pigweed – these weeds haunt farmers nationwide, causing crop yield losses as...
  Grow News      Herbicide Resistant Weeds      Cover Crops   

How to Manage Cereal Rye in the Upper Midwest for Weed Suppression and Max Yields

  March 11, 2025   Grow IWM
Weeds don’t stand a chance…if you time it right. New research is finally providing much-needed data to upper Midwest farmers...
  Grow News      Cover Crops      Herbicide Resistance      Herbicide Management   

All-of-the-Above Management: Weed Control in Organic Grain Production in the Pacific Northwest

  March 4, 2025   Grow IWM
Demand for organic small grains is increasing, and the semiarid U.S. Pacific Northwest is well-suited to small grain production....
  Integrated Weed Management Innovations      Herbicide Management      Precision Weed Management      DIGITAL AGRICULTURE      Cover Crops      Mechanical Weed Control      Herbicide Resistant Weeds   

Seed Impact Mill Pulverizes Problematic Waterhemp in New Study

  February 25, 2025   Grow IWM
Recently-published research has reinforced that “milling around” with seed impact mills can help keep escaped waterhemp from...
  Mechanical Weed Control      Harvest Weed Seed Management      Herbicide Resistant Weeds      Herbicide Management      Grow News      Harvest Weed Seed Control   

Farming Peanuts with Cover Crops in Virginia

  February 11, 2025   Grow IWM
“Cover crops” and “peanuts” don’t get used in the same sentence too often. With limited herbicide options available and...
  Cover Crops      Herbicide Resistant Weeds      Integrated Weed Management Innovations      Grow News   

A Handheld Extension Agent? GROW Researchers Put ExtensionBot to the Test

  April 15, 2025   Grow IWM
AI is sowing new possibilities in agriculture, from precision herbicide applications to mapping weeds and cover crops in fields....
  Grow News      Industry News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Cover Crops      DIGITAL AGRICULTURE      Herbicide Management   

Seed Impact Mill Pulverizes Problematic Waterhemp in New Study

  February 25, 2025   Grow IWM
Recently-published research has reinforced that “milling around” with seed impact mills can help keep escaped waterhemp from...
  Mechanical Weed Control      Harvest Weed Seed Management      Herbicide Resistant Weeds      Herbicide Management      Grow News      Harvest Weed Seed Control   

Weed Management Planner: Order Your Free Prints Now! 

  February 18, 2025   Grow IWM
GROW’s Weed Management Planner is many things – color-coded, comprehensive, and packed with information!  But we admit,...
  Herbicide Management      Fact Sheets      Cover Crops      Mechanical Weed Control      Integrated Weed Management Innovations      Harvest Weed Seed Control      Grow News   

Extension and Farmers Greet Weed Control Option with ‘G’day’

  November 19, 2024   Grow IWM
This article is reprinted with permission from University of Minnesota Extension. In growing crops, much hinges on what happens...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

GROW Releases New Herbicide Resistance Resource for the Industry

  October 15, 2024   Grow IWM
As herbicide resistance spreads, so must education on what it is and how to manage it. That’s the goal behind GROW’s newest...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Weed Electrocution      Precision Weed Management      Herbicide Management   

Narrow Windrow Burning for Weed Seed Control is Risky Business

  September 3, 2024   Grow IWM
Sometimes when a plan looks good on paper, it doesn’t necessarily mean its execution is the best idea. Weed scientists are...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management   

Learn When Weeds Shed Their Seeds (And Why It Matters!)

  August 13, 2024   Grow IWM
A weed without seeds at harvest time is a lost cause for harvest weed seed control. That’s why GROW researchers from 14...
  Grow News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Fact Sheets   

A Weed Seed Killing Machine: Testing the integrated Harrington Seed Destructor

  August 6, 2024   Grow IWM
With a rise in herbicide-resistant weeds such as Palmer amaranth and common ragweed escaping in-season control methods, weed...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

Learn from the Best: GROW Farmer Case Studies 

  July 22, 2024   Grow IWM
Every good ag researcher knows the power of an innovative farmer. Take, for example, the no-till movement. As the Dust Bowl raged...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Cover Crops      featured      Weed Electrocution   

Can Seed Impact Mills Kill Weed Seeds in Cotton?

  July 2, 2024   Grow IWM
Seed impact mills have shown promise as a weed control option in crops like wheat and soybeans. But what about cotton? A joint...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

Weed Science Field Days: What’s In It For Me? 

  May 28, 2024   Grow IWM
It happens like clockwork almost every year, starting in June. Wagons bounce over field ruts, filled with people clutching...
  Grow News      Industry News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Weed Electrocution      Precision Weed Management   

Can Weeds Adapt to Beat Harvest Weed Seed Control?

  May 7, 2024   Grow IWM
Weeds think they’re pretty smart. Since modern agriculture began, weeds have been evolving and lying in wait to grow again –...
  Grow News      Industry News      Harvest Weed Seed Control      Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management   

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?

Jimsonweed
Velvetleaf
Foxtail (Giant)
Broadleaf Signalgrass
Redroot & Smooth Pigweed
Texas Millet (Panicum)
Canada Thistle
Pokeweed (Common)
Rush Skeletonweed
Russian Thistle
Prickly Lettuce