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

How Does Planting Green Affect Herbicide Use, Soil Moisture & More? 

  June 8, 2023   Grow IWM
The practice of planting green into a living cover crop stand can be a great tool for suppressing weeds, but it comes with a lot...
  Cover Crops      Prevention      Industry News      Integrated Weed Management Innovations   

Time to Scout for Weed Escapes

  June 6, 2023   Grow IWM
The planting season is winding down, but crops are probably not the only thing taking advantage of your carefully prepared...
  Grow News      Herbicide Resistant Weeds      Prevention   

How to Use “Many Little Hammers” to Manage Waterhemp

  May 30, 2023   Grow IWM
It’s time to catch weeds by surprise. They know our herbicide habits pretty well, but what if farmers could start targeting...
  Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops   

Narrow Rows & Cover Crops Boost Weed Control in Soybeans

  May 23, 2023   Grow IWM
If your soybean herbicide program needs a new wingman or two, Justine Fisher has two suggestions: cover crops and narrow soybean...
  News From Other Sources      Cover Crops      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      featured   

Research Deep Dive: How to Suppress Palmer Amaranth with Cover Crops

  May 16, 2023   Grow IWM
Should you plant brown or green into cover crops? Roll your cover or leave it standing? How much biomass do you need?  These are...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

New Tool Explores Available Cover Crop Incentive Programs   

  May 9, 2023   Grow IWM
A growing number of programs exist to reward and incentivize farmers for using cover crops. But finding and understanding them...
  Cover Crops      featured      Industry News      News From Other Sources   

Scientists Use Drone Cameras to Spot Herbicide-Resistant Plants

  May 2, 2023   Grow IWM
Finding and confirming herbicide-resistant weeds can be a real slog. It takes months, sometimes years, of field and lab work to...
  DIGITAL AGRICULTURE      Industry News      Herbicide Resistant Weeds      News From Other Sources      Prevention      Herbicide Resistance   

How to Identify Grass Weeds Early in the Season

  April 25, 2023   Grow IWM
Grasses are some of the trickiest weed species to identify. They are easier to distinguish once their seedheads emerge, but...
  Grow News      Herbicide Resistant Weeds      Prevention   

How to Sample Cover Crop Biomass

  April 21, 2023   Grow IWM
What are you getting out of your cover crop? Knowing how much of each cover crop species is growing in your field is the first...
  Grow News      Cover Crops   

Why Starting Weed-Free at Planting is So Important

  April 18, 2023   Grow IWM
Starting weed-free (also known as “starting clean”) means planting into fields without emerged weeds, which provides...
  Grow News      Herbicide Resistant Weeds      Prevention      featured   

Planting Green: Do Higher Cover Crop Seeding Rates Improve Weed Suppression?

  April 11, 2023   Grow IWM
The idea that increasing cover crop seeding rates will increase the cover crop’s biomass and weed suppressive benefits is a...
  Industry News      Integrated Weed Management Innovations      News From Other Sources      Cover Crops   

Farmer Forum Recap: Cover Crop Termination

  April 4, 2023   Grow IWM
In GROW’s first Farmer Forum of the 2023 season, a panel of farmers from Wisconsin, Pennsylvania and Virginia shared their...
  Cover Crops      featured      Grow News   

How Does Planting Green Affect Herbicide Use, Soil Moisture & More? 

  June 8, 2023   Grow IWM
The practice of planting green into a living cover crop stand can be a great tool for suppressing weeds, but it comes with a lot...
  Cover Crops      Prevention      Industry News      Integrated Weed Management Innovations   

How to Use “Many Little Hammers” to Manage Waterhemp

  May 30, 2023   Grow IWM
It’s time to catch weeds by surprise. They know our herbicide habits pretty well, but what if farmers could start targeting...
  Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops   

Narrow Rows & Cover Crops Boost Weed Control in Soybeans

  May 23, 2023   Grow IWM
If your soybean herbicide program needs a new wingman or two, Justine Fisher has two suggestions: cover crops and narrow soybean...
  News From Other Sources      Cover Crops      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      featured   

Research Deep Dive: How to Suppress Palmer Amaranth with Cover Crops

  May 16, 2023   Grow IWM
Should you plant brown or green into cover crops? Roll your cover or leave it standing? How much biomass do you need?  These are...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

New Tool Explores Available Cover Crop Incentive Programs   

  May 9, 2023   Grow IWM
A growing number of programs exist to reward and incentivize farmers for using cover crops. But finding and understanding them...
  Cover Crops      featured      Industry News      News From Other Sources   

How to Sample Cover Crop Biomass

  April 21, 2023   Grow IWM
What are you getting out of your cover crop? Knowing how much of each cover crop species is growing in your field is the first...
  Grow News      Cover Crops   

Planting Green: Do Higher Cover Crop Seeding Rates Improve Weed Suppression?

  April 11, 2023   Grow IWM
The idea that increasing cover crop seeding rates will increase the cover crop’s biomass and weed suppressive benefits is a...
  Industry News      Integrated Weed Management Innovations      News From Other Sources      Cover Crops   

Farmer Forum Recap: Cover Crop Termination

  April 4, 2023   Grow IWM
In GROW’s first Farmer Forum of the 2023 season, a panel of farmers from Wisconsin, Pennsylvania and Virginia shared their...
  Cover Crops      featured      Grow News   

Mowing, Zapping, and Outcompeting Weeds: Opportunities and Trade-Offs

  March 21, 2023   Grow IWM
Do you have a passion for finding alternative solutions to manage weeds? Do you like to stay up to date on the latest weed...
  Mechanical Weed Control      News From Other Sources      Cover Crops      Prevention      Industry News      Weed Electrocution      Integrated Weed Management Innovations   

Join a GROW Farmer Forum on Cover Crop Termination

  March 10, 2023   Grow IWM
GROW will be hosting its its first Farmer Forum of the 2023 season on Wednesday, March 29, at 2 p.m. EDT. Listen in —...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

How Does Cover Crop Residue Interact with Soil Residual Herbicides?

  March 7, 2023   Grow IWM
We know cover crops can provide a physical barrier on top of the soil to smother and suppress emerging weeds. But many...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      featured   

Four Takeaways on Cover Crops and Weed Control from WSSA

  February 7, 2023   Grow IWM
Using cover crops for weed suppression can be complicated, so it’s little surprise that the past decade’s worth of research...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News   

Time to Scout for Weed Escapes

  June 6, 2023   Grow IWM
The planting season is winding down, but crops are probably not the only thing taking advantage of your carefully prepared...
  Grow News      Herbicide Resistant Weeds      Prevention   

Research Deep Dive: How to Suppress Palmer Amaranth with Cover Crops

  May 16, 2023   Grow IWM
Should you plant brown or green into cover crops? Roll your cover or leave it standing? How much biomass do you need?  These are...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

How to Identify Grass Weeds Early in the Season

  April 25, 2023   Grow IWM
Grasses are some of the trickiest weed species to identify. They are easier to distinguish once their seedheads emerge, but...
  Grow News      Herbicide Resistant Weeds      Prevention   

How to Sample Cover Crop Biomass

  April 21, 2023   Grow IWM
What are you getting out of your cover crop? Knowing how much of each cover crop species is growing in your field is the first...
  Grow News      Cover Crops   

Why Starting Weed-Free at Planting is So Important

  April 18, 2023   Grow IWM
Starting weed-free (also known as “starting clean”) means planting into fields without emerged weeds, which provides...
  Grow News      Herbicide Resistant Weeds      Prevention      featured   

Farmer Forum Recap: Cover Crop Termination

  April 4, 2023   Grow IWM
In GROW’s first Farmer Forum of the 2023 season, a panel of farmers from Wisconsin, Pennsylvania and Virginia shared their...
  Cover Crops      featured      Grow News   

Spring is Here. Time to Find Your Favorite Weed ID Tool!

  March 28, 2023   Grow IWM
Can you recognize every weed growing in your field this spring, from seedling to seedhead? If not, GROW’s Weed Identification...
  Grow News      Prevention   

Updates on Harvest Weed Seed Control from WSSA Members Across the Country

  March 14, 2023   Grow IWM
Harvest weed seed control research is growing across the U.S., with farmers and researchers trying out chaff lining and seed...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control   

Join a GROW Farmer Forum on Cover Crop Termination

  March 10, 2023   Grow IWM
GROW will be hosting its its first Farmer Forum of the 2023 season on Wednesday, March 29, at 2 p.m. EDT. Listen in —...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

GROW is Hiring a Post-Doctoral Researcher

  March 2, 2023   Grow IWM
A unique opportunity is now open for a post-doctoral researcher to join GROW (www.growiwm.org), a dynamic research and extension...
  Grow News      featured   

How a National Image Repository Can Transform Agriculture

  February 28, 2023   Grow IWM
The National Agricultural Image Repository (NAIR) is a large-scale, multi-state effort to build and share weed and crop images,...
  Grow News      featured      DIGITAL AGRICULTURE   

The Ag Image Repository: A First Step in Accessible Precision Ag

  February 21, 2023   Grow IWM
So much of precision agriculture – such as precision spraying technology or weed-identifying apps – relies on images. ...
  featured      DIGITAL AGRICULTURE      Grow News   

Time to Scout for Weed Escapes

  June 6, 2023   Grow IWM
The planting season is winding down, but crops are probably not the only thing taking advantage of your carefully prepared...
  Grow News      Herbicide Resistant Weeds      Prevention   

How to Use “Many Little Hammers” to Manage Waterhemp

  May 30, 2023   Grow IWM
It’s time to catch weeds by surprise. They know our herbicide habits pretty well, but what if farmers could start targeting...
  Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops   

Narrow Rows & Cover Crops Boost Weed Control in Soybeans

  May 23, 2023   Grow IWM
If your soybean herbicide program needs a new wingman or two, Justine Fisher has two suggestions: cover crops and narrow soybean...
  News From Other Sources      Cover Crops      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      featured   

Research Deep Dive: How to Suppress Palmer Amaranth with Cover Crops

  May 16, 2023   Grow IWM
Should you plant brown or green into cover crops? Roll your cover or leave it standing? How much biomass do you need?  These are...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention   

Scientists Use Drone Cameras to Spot Herbicide-Resistant Plants

  May 2, 2023   Grow IWM
Finding and confirming herbicide-resistant weeds can be a real slog. It takes months, sometimes years, of field and lab work to...
  DIGITAL AGRICULTURE      Industry News      Herbicide Resistant Weeds      News From Other Sources      Prevention      Herbicide Resistance   

How to Identify Grass Weeds Early in the Season

  April 25, 2023   Grow IWM
Grasses are some of the trickiest weed species to identify. They are easier to distinguish once their seedheads emerge, but...
  Grow News      Herbicide Resistant Weeds      Prevention   

Why Starting Weed-Free at Planting is So Important

  April 18, 2023   Grow IWM
Starting weed-free (also known as “starting clean”) means planting into fields without emerged weeds, which provides...
  Grow News      Herbicide Resistant Weeds      Prevention      featured   

Join a GROW Farmer Forum on Cover Crop Termination

  March 10, 2023   Grow IWM
GROW will be hosting its its first Farmer Forum of the 2023 season on Wednesday, March 29, at 2 p.m. EDT. Listen in —...
  Grow News      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops   

How Does Cover Crop Residue Interact with Soil Residual Herbicides?

  March 7, 2023   Grow IWM
We know cover crops can provide a physical barrier on top of the soil to smother and suppress emerging weeds. But many...
  Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      featured   

Three Weird Ways Weed Seeds Can Travel

  February 14, 2023   Grow IWM
Weeds have plenty of biological tricks to spread seeds on their own, but they also get an assist from a few surprising sources,...
  featured      Grow News      Herbicide Resistant Weeds      Prevention   

Four Takeaways on Cover Crops and Weed Control from WSSA

  February 7, 2023   Grow IWM
Using cover crops for weed suppression can be complicated, so it’s little surprise that the past decade’s worth of research...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Grow News      featured      Industry News   

How to Manage Weeds in the Face of Regulation and Resistance

  January 24, 2023   Grow IWM
There’s a double threat looming for farmers using herbicides alone to manage weeds: regulation and resistance. Both are...
  Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops      Industry News   

Updates on Harvest Weed Seed Control from WSSA Members Across the Country

  March 14, 2023   Grow IWM
Harvest weed seed control research is growing across the U.S., with farmers and researchers trying out chaff lining and seed...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control   

How to Manage Weeds in the Face of Regulation and Resistance

  January 24, 2023   Grow IWM
There’s a double threat looming for farmers using herbicides alone to manage weeds: regulation and resistance. Both are...
  Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops      Industry News   

Are You a Fan of DIY Weed Control? Try Chaff Lining.

  January 3, 2023   Grow IWM
Harvest weed seed control doesn’t have to be fancy or expensive. Just ask Michael Flessner, Extension Weed Specialist at...
  Prevention      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management   

The Australian Weed Control Revolution

  December 13, 2022   Grow IWM
Harvest weed seed control is an Australian innovation born of necessity. Farmers have long relied heavily on herbicides in the...
  News From Other Sources      Harvest Weed Seed Management      Prevention      Industry News      featured      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Herbicide Resistance   

Farmer Forum Recap: Combine Set-Up for Threshing Green Material

  December 6, 2022   Grow IWM
In the final Farmer Forum of the 2022 season on November 29, Australian presenters shared their combine threshing secrets for...
  Mechanical Weed Control      Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

The Fate of Weed Seeds: Where Do They Go in a Combine?

  November 10, 2022   Grow IWM
Weed seeds vanish from our view when they enter a combine at harvest, but Virginia Tech researchers want to unmask the mystery of...
  Herbicide Resistant Weeds      Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

Farmer Forum Recap: How to Optimize Threshing Settings for Harvest Weed Seed Control

  October 28, 2022   Grow IWM
In GROW’s fourth Farmer Forum of the season, Australian combine experts took a deep dive into combine settings for threshing...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

Does Harvest Weed Seed Control Work in Rice Fields?

  October 26, 2022   Grow IWM
Texas researchers want to know how harvest weed seed control tactics such as the integrated Harrington Seed Destructor (iHSD)...
  Harvest Weed Seed Management      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations   

Texas Rice Farmer Tries Out iHSD to Halt Weed Seedbank

  October 13, 2022   Grow IWM
GROW headed to Texas recently to interview Bryan Wiese, owner of Wiese Brothers Farm in Wharton, about his unique decision to try...
  featured      Grow News      Harvest Weed Seed Control   

Farmer Forum Recap: How to Set Up Combine Headers for Weed Seed Capture

  October 11, 2022   Claudio Rubione
In GROW’s third Farmer Forum of the season, Australian combine experts presented on how to set up a combine header to capture...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management   

Meet Ray Harrington, Founder of the Harrington Seed Destructor

  October 7, 2022   Grow IWM
The Harrington Seed Destructor (HSD) is now an internationally known tool, but it all started more than two decades ago, as the...
  Herbicide Resistant Weeds      Mechanical Weed Control      Harvest Weed Seed Management      Grow News      Harvest Weed Seed Control      featured      Integrated Weed Management Innovations   

Can A Corn Header Capture Weed Seeds?

  September 27, 2022   Grow IWM
Capturing as many weed seeds as possible during the harvest operation is key to optimizing any harvest weed seed control option,...
  featured      Grow News      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 wide-spread use of no-till and limited cultivation for weed control, improving soil health. However, over reliance on a few key herbicides has caused the development of particularly problematic 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) combines various methods to reduce or eliminate the effect of weeds on crop production over time, using a combination of practices that are most effective for solving specific weed issues. 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