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

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...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      featured      Grow News   

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...
  Cover Crops      Industry News      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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Prevention      Grow News      Harvest Weed Seed Control   

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   

Three Things to Know About Spot Spray Technology Today

  September 11, 2023   Grow IWM
If you aren’t familiar with the growing industry of precision weed applications – known generically as spot spray, smart...
  Precision Weed Management      Industry News      Herbicide Resistant Weeds      News From Other Sources      DIGITAL AGRICULTURE   

Chaff Lining Limits Weed Seed Spread at Harvest, Research Finds

  September 5, 2023   Grow IWM
See those waterhemp escapes towering over your soybeans right now? They’re looking forward to harvest, when combines will mow...
  Harvest Weed Seed Management      Prevention      Industry News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      News From Other Sources   

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.  Is...
  Prevention      Industry News      Integrated Weed Management Innovations      Cover Crops   

Planting Fall Covers? Know Your Herbicide Carryover Risks.

  August 15, 2023   Grow IWM
It’s fall cover crop seeding time, and with large swaths of the Midwest facing droughty soils, herbicide carryover injury could...
  Grow News      Cover Crops      featured   

Is it Time to Consider Harvest Weed Seed Control?

  August 8, 2023   Grow IWM
Ah, August — when the weed control failures of spring and early summer creep above the canopy for all to see. If you’re...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      Prevention      Grow News   

The Lowdown on Flowering Weeds & Viable Seeds

  August 1, 2023   Grow IWM
As the days shorten and the heat soars, those weed escapes in your fields may be getting ready to make their annual seedbank...
  Prevention      Grow News      Mechanical Weed Control      Harvest Weed Seed Management   

Farmer Forum Recap: Cover Crop Seeding

  July 25, 2023   Grow IWM
In GROW’s latest Farmer Forum, a panel of farmers from Delaware, New York and Texas shared their experiences with all aspects...
  Integrated Weed Management Innovations      Cover Crops      Prevention      Grow News   

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...
  Cover Crops      Industry News      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

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.  Is...
  Prevention      Industry News      Integrated Weed Management Innovations      Cover Crops   

Planting Fall Covers? Know Your Herbicide Carryover Risks.

  August 15, 2023   Grow IWM
It’s fall cover crop seeding time, and with large swaths of the Midwest facing droughty soils, herbicide carryover injury could...
  Grow News      Cover Crops      featured   

Farmer Forum Recap: Cover Crop Seeding

  July 25, 2023   Grow IWM
In GROW’s latest Farmer Forum, a panel of farmers from Delaware, New York and Texas shared their experiences with all aspects...
  Integrated Weed Management Innovations      Cover Crops      Prevention      Grow News   

The Cover Crop That Never Dies: Scientists Explore Living Mulch

  July 18, 2023   Grow IWM
Imagine a cover crop that never stops growing — nestled between the rows of a cash crop, continuously suppressing weeds and...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Industry News   

Join a GROW Farmer Forum on Cover Crop Seeding

  June 27, 2023   Grow IWM
GROW will be hosting a Farmer Forum on July 18th, 2023, at 2 p.m. ET. The forum’s presenters will explore everything to do...
  Integrated Weed Management Innovations      Cover Crops      Prevention      featured      Grow News   

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

  June 20, 2023   Grow IWM
“We are in Palmer amaranth country down here,” as Cumberland, Virginia farmer Anthony Beery puts it.  Beery, who grows row...
  Grow News      featured      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention   

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...
  Prevention      Industry News      Integrated Weed Management Innovations      Cover Crops   

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...
  Cover Crops      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      featured      News From Other Sources   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      News From Other Sources      Cover Crops      Prevention      Grow News   

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...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      featured      Grow News   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Prevention      Grow News      Harvest Weed Seed Control   

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   

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   

Planting Fall Covers? Know Your Herbicide Carryover Risks.

  August 15, 2023   Grow IWM
It’s fall cover crop seeding time, and with large swaths of the Midwest facing droughty soils, herbicide carryover injury could...
  Grow News      Cover Crops      featured   

Is it Time to Consider Harvest Weed Seed Control?

  August 8, 2023   Grow IWM
Ah, August — when the weed control failures of spring and early summer creep above the canopy for all to see. If you’re...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      Prevention      Grow News   

The Lowdown on Flowering Weeds & Viable Seeds

  August 1, 2023   Grow IWM
As the days shorten and the heat soars, those weed escapes in your fields may be getting ready to make their annual seedbank...
  Prevention      Grow News      Mechanical Weed Control      Harvest Weed Seed Management   

Farmer Forum Recap: Cover Crop Seeding

  July 25, 2023   Grow IWM
In GROW’s latest Farmer Forum, a panel of farmers from Delaware, New York and Texas shared their experiences with all aspects...
  Integrated Weed Management Innovations      Cover Crops      Prevention      Grow News   

Virginia Tech Scientists Test See & Spray Tech from Blue River & John Deere

  July 11, 2023   Grow IWM
The long-awaited promise of precision spray technology seems closer than ever, especially to Virginia Tech researchers who are...
  Industry News      Herbicide Resistant Weeds      featured      DIGITAL AGRICULTURE      Grow News   

Join a GROW Farmer Forum on Cover Crop Seeding

  June 27, 2023   Grow IWM
GROW will be hosting a Farmer Forum on July 18th, 2023, at 2 p.m. ET. The forum’s presenters will explore everything to do...
  Integrated Weed Management Innovations      Cover Crops      Prevention      featured      Grow News   

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

  June 20, 2023   Grow IWM
“We are in Palmer amaranth country down here,” as Cumberland, Virginia farmer Anthony Beery puts it.  Beery, who grows row...
  Grow News      featured      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention   

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...
  Herbicide Resistant Weeds      Prevention      Grow News   

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...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      featured      Grow News   

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...
  Cover Crops      Industry News      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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Prevention      Grow News      Harvest Weed Seed Control   

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   

Three Things to Know About Spot Spray Technology Today

  September 11, 2023   Grow IWM
If you aren’t familiar with the growing industry of precision weed applications – known generically as spot spray, smart...
  Precision Weed Management      Industry News      Herbicide Resistant Weeds      News From Other Sources      DIGITAL AGRICULTURE   

The Cover Crop That Never Dies: Scientists Explore Living Mulch

  July 18, 2023   Grow IWM
Imagine a cover crop that never stops growing — nestled between the rows of a cash crop, continuously suppressing weeds and...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention      Industry News   

Virginia Tech Scientists Test See & Spray Tech from Blue River & John Deere

  July 11, 2023   Grow IWM
The long-awaited promise of precision spray technology seems closer than ever, especially to Virginia Tech researchers who are...
  Industry News      Herbicide Resistant Weeds      featured      DIGITAL AGRICULTURE      Grow News   

Catch & Kill: Targeting the Seedbank with Harvest Weed Seed Control

  July 4, 2023   Grow IWM
Can harvest weed seed control technology actually reduce the vast deposits of weed seeds buried in Midwest soybean fields? ...
  Harvest Weed Seed Control      Prevention      Integrated Weed Management Innovations      Herbicide Resistant Weeds      featured      Mechanical Weed Control      Industry News      Harvest Weed Seed Management   

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

  June 20, 2023   Grow IWM
“We are in Palmer amaranth country down here,” as Cumberland, Virginia farmer Anthony Beery puts it.  Beery, who grows row...
  Grow News      featured      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Cover Crops      Prevention   

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...
  Herbicide Resistant Weeds      Prevention      Grow News   

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...
  Cover Crops      Integrated Weed Management Innovations      Prevention      Herbicide Resistant Weeds      featured      News From Other Sources   

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...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      featured      Grow News   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Mechanical Weed Control      Prevention      Grow News      Harvest Weed Seed Control   

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   

Chaff Lining Limits Weed Seed Spread at Harvest, Research Finds

  September 5, 2023   Grow IWM
See those waterhemp escapes towering over your soybeans right now? They’re looking forward to harvest, when combines will mow...
  Harvest Weed Seed Management      Prevention      Industry News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      News From Other Sources   

Is it Time to Consider Harvest Weed Seed Control?

  August 8, 2023   Grow IWM
Ah, August — when the weed control failures of spring and early summer creep above the canopy for all to see. If you’re...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      Prevention      Grow News   

Catch & Kill: Targeting the Seedbank with Harvest Weed Seed Control

  July 4, 2023   Grow IWM
Can harvest weed seed control technology actually reduce the vast deposits of weed seeds buried in Midwest soybean fields? ...
  Harvest Weed Seed Control      Prevention      Integrated Weed Management Innovations      Herbicide Resistant Weeds      featured      Mechanical Weed Control      Industry News      Harvest Weed Seed Management   

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...
  Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      featured   

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...
  Herbicide Resistant Weeds      Herbicide Resistance      Mechanical Weed Control      News From Other Sources      Weed Electrocution      Grow News      Cover Crops      Industry News      Harvest Weed Seed Control      Harvest Weed Seed Management      Integrated Weed Management Innovations      Prevention   

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...
  Harvest Weed Seed Management      Prevention      featured      Grow News      Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds   

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...
  Integrated Weed Management Innovations      Herbicide Resistant Weeds      Herbicide Resistance      News From Other Sources      Harvest Weed Seed Management      Prevention      Industry News      featured      Harvest Weed Seed Control   

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...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Mechanical Weed Control      Harvest Weed Seed Management      featured      Grow News   

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...
  Harvest Weed Seed Control      Integrated Weed Management Innovations      Herbicide Resistant Weeds      Harvest Weed Seed Management      featured      Grow News   

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