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.

Learn About Grow

Recent GROW News & Research Updates

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

A Deep Dive on the See & Spray Ultimate System from John Deere & Blue River

July 16, 2024 Grow IWM

See & Spray Ultimate, the recently introduced precision sprayer from John Deere and Blue River that uses cameras and computer...

Industry News Herbicide Resistant Weeds DIGITAL AGRICULTURE Precision Weed Management

USDA-NIFA Grant Supports Microwave Tech to Zap Weed Seeds

July 9, 2024 Grow IWM

The following is reprinted with permission from the Arkansas Agricultural Experiment Station. It’s not just for burritos and...

Industry News Integrated Weed Management Innovations Herbicide Resistant Weeds Prevention

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 Look-Alikes Could Pose Threat to Camera-Based Weed Detection

June 25, 2024 Grow IWM

It is said that imitation is the sincerest form of flattery. For certain weeds, it can mean survival. Researchers have...

Industry News Herbicide Resistant Weeds Mechanical Weed Control DIGITAL AGRICULTURE Precision Weed Management

Weed Management in Double Crop Soybeans

June 18, 2024 Grow IWM

Double the crop, half the weed control – that’s part of the allure of following wheat harvest with a second planting of...

Grow News Industry News Herbicide Resistant Weeds Prevention

Sterile Pollen Technique Shows Promise for Palmer Amaranth Weed Control

June 11, 2024 Grow IWM

The following is reprinted from Weed Science, a journal of the Weed Science Society of America. Recently published research in...

Industry News Integrated Weed Management Innovations Herbicide Resistant Weeds News From Other Sources Prevention

Don’t Miss Last Call for Vining Weed Control in Corn

June 4, 2024 Grow IWM

As your corn starts to canopy and close ranks this month, make sure those narrowing rows of today aren’t hiding the vines of...

Grow News Industry News Herbicide Resistant Weeds Prevention

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

Meet GROW’s New Page: The Basics of Herbicide Resistance

May 21, 2024 Grow IWM

Sometimes, to solve a complex problem like herbicide resistance, you have to go back to the beginning and master the basics....

Grow News Herbicide Resistant Weeds featured Herbicide Resistance

Contributors Needed for Weed Mapping Project

May 14, 2024 Grow IWM

It’s a wild, weedy world out there, but some scientists are hoping to impose a little order on the seasonal chaos of weed...

News From Other Sources Industry News Herbicide Resistant Weeds

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 –...

Industry News Harvest Weed Seed Control Herbicide Resistant Weeds Mechanical Weed Control Harvest Weed Seed Management Grow News

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

Study Shines Light on Drill-interseeded Cover Crops in Corn

May 2, 2024 Grow IWM

The following is reprinted from Weed Science, a journal of the Weed Science Society of America. Recently published research in...

Industry News Integrated Weed Management Innovations News From Other Sources Cover Crops

Cover Crops and Residual Herbicides Team Up Against Palmer Amaranth

April 30, 2024 Grow IWM

Palmer amaranth is famous for dodging herbicide control options, but it appears that a one-two punch of cover crop residue and...

Grow News Industry News Herbicide Resistant Weeds Cover Crops

New Research on How to Apply Residual Herbicides When Planting Green

April 16, 2024 Grow IWM

Planting soybeans into a green, living cover crop can require some extra management decisions, such as when to apply those...

Grow News Integrated Weed Management Innovations Herbicide Resistant Weeds Cover Crops

The Lowdown on Roller Crimpers

April 2, 2024 Grow IWM

Roller crimpers can be a valuable tool for terminating cover crops or simply managing cover crop residue, especially when...

Grow News Integrated Weed Management Innovations Cover Crops

A Look at Planter Adjustments for Planting into Cover Crops

March 26, 2024 Grow IWM

When adjusting your planter to run through high-residue cover crops, Trey Hill has some advice: Don’t get too...

Grow News Integrated Weed Management Innovations Cover Crops

Allow Us to Introduce Ourselves (Again!)

March 14, 2024 Grow IWM

Like the science we study and share, GROW is evolving and expanding quickly, and we decided it was time for our website to...

Grow News Harvest Weed Seed Control Integrated Weed Management Innovations Herbicide Resistant Weeds Cover Crops DIGITAL AGRICULTURE Precision Weed Management

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...

Grow News Industry News Herbicide Resistant Weeds Cover Crops Prevention

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...

Industry News Herbicide Resistant Weeds News From Other Sources Cover Crops Prevention

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...

Grow News Industry News News From Other Sources Cover Crops

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...

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

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 Management in Double Crop Soybeans

June 18, 2024 Grow IWM

Double the crop, half the weed control – that’s part of the allure of following wheat harvest with a second planting of...

Grow News Industry News Herbicide Resistant Weeds Prevention

Don’t Miss Last Call for Vining Weed Control in Corn

June 4, 2024 Grow IWM

As your corn starts to canopy and close ranks this month, make sure those narrowing rows of today aren’t hiding the vines of...

Grow News Industry News Herbicide Resistant Weeds Prevention

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

Meet GROW’s New Page: The Basics of Herbicide Resistance

May 21, 2024 Grow IWM

Sometimes, to solve a complex problem like herbicide resistance, you have to go back to the beginning and master the basics....

Grow News Herbicide Resistant Weeds featured Herbicide Resistance

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 –...

Industry News Harvest Weed Seed Control Herbicide Resistant Weeds Mechanical Weed Control Harvest Weed Seed Management Grow News

Cover Crops and Residual Herbicides Team Up Against Palmer Amaranth

April 30, 2024 Grow IWM

Palmer amaranth is famous for dodging herbicide control options, but it appears that a one-two punch of cover crop residue and...

Grow News Industry News Herbicide Resistant Weeds Cover Crops

Farmer Forum Recap: Using Drones for Weed Management

April 23, 2024 Grow IWM

In this GROW Farmer Forum, two panelists led a discussion of the current state of drone scouting, mapping and herbicide...

Integrated Weed Management Innovations Precision Weed Management DIGITAL AGRICULTURE Herbicide Resistant Weeds Industry News Grow News

New Research on How to Apply Residual Herbicides When Planting Green

April 16, 2024 Grow IWM

Planting soybeans into a green, living cover crop can require some extra management decisions, such as when to apply those...

Grow News Integrated Weed Management Innovations Herbicide Resistant Weeds Cover Crops

Meet Science for Success!

April 5, 2024 Grow IWM

Farmers successfully grow millions of acres of soybeans every year, but we know they are always looking for ways to better...

Grow News News From Other Sources Herbicide Resistant Weeds Integrated Weed Management Innovations Industry News

Join a GROW Farmer Forum on Drones & Weed Management

April 4, 2024 Grow IWM

This forum is now archived and available HERE. GROW will host a Farmer Forum on April 15, 2024, at 2 p.m. ET. The Forum will...

Grow News Industry News Integrated Weed Management Innovations DIGITAL AGRICULTURE Precision Weed Management

A Deep Dive on the See & Spray Ultimate System from John Deere & Blue River

July 16, 2024 Grow IWM

See & Spray Ultimate, the recently introduced precision sprayer from John Deere and Blue River that uses cameras and computer...

Industry News Herbicide Resistant Weeds DIGITAL AGRICULTURE Precision Weed Management

USDA-NIFA Grant Supports Microwave Tech to Zap Weed Seeds

July 9, 2024 Grow IWM

The following is reprinted with permission from the Arkansas Agricultural Experiment Station. It’s not just for burritos and...

Industry News Integrated Weed Management Innovations Herbicide Resistant Weeds Prevention

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 Look-Alikes Could Pose Threat to Camera-Based Weed Detection

June 25, 2024 Grow IWM

It is said that imitation is the sincerest form of flattery. For certain weeds, it can mean survival. Researchers have...

Industry News Herbicide Resistant Weeds Mechanical Weed Control DIGITAL AGRICULTURE Precision Weed Management

Weed Management in Double Crop Soybeans

June 18, 2024 Grow IWM

Double the crop, half the weed control – that’s part of the allure of following wheat harvest with a second planting of...

Grow News Industry News Herbicide Resistant Weeds Prevention

Sterile Pollen Technique Shows Promise for Palmer Amaranth Weed Control

June 11, 2024 Grow IWM

The following is reprinted from Weed Science, a journal of the Weed Science Society of America. Recently published research in...

Industry News Integrated Weed Management Innovations Herbicide Resistant Weeds News From Other Sources Prevention

Don’t Miss Last Call for Vining Weed Control in Corn

June 4, 2024 Grow IWM

As your corn starts to canopy and close ranks this month, make sure those narrowing rows of today aren’t hiding the vines of...

Grow News Industry News Herbicide Resistant Weeds Prevention

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

Meet GROW’s New Page: The Basics of Herbicide Resistance

May 21, 2024 Grow IWM

Sometimes, to solve a complex problem like herbicide resistance, you have to go back to the beginning and master the basics....

Grow News Herbicide Resistant Weeds featured Herbicide Resistance

Contributors Needed for Weed Mapping Project

May 14, 2024 Grow IWM

It’s a wild, weedy world out there, but some scientists are hoping to impose a little order on the seasonal chaos of weed...

News From Other Sources Industry News Herbicide Resistant Weeds

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 –...

Industry News Harvest Weed Seed Control Herbicide Resistant Weeds Mechanical Weed Control Harvest Weed Seed Management Grow News

Cover Crops and Residual Herbicides Team Up Against Palmer Amaranth

April 30, 2024 Grow IWM

Palmer amaranth is famous for dodging herbicide control options, but it appears that a one-two punch of cover crop residue and...

Grow News Industry News Herbicide Resistant Weeds Cover Crops

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 –...

Industry News Harvest Weed Seed Control Herbicide Resistant Weeds Mechanical Weed Control Harvest Weed Seed Management Grow News

GROW Reports on New Harvest Weed Seed Control Research in Australia

March 19, 2024 Grow IWM

I recently returned from a trip to Western Australia to meet with weed scientist Dr. Michael Walsh, along with fellow GROW team...

Grow News Harvest Weed Seed Control Integrated Weed Management Innovations Herbicide Resistant Weeds News From Other Sources Harvest Weed Seed Management

Allow Us to Introduce Ourselves (Again!)

March 14, 2024 Grow IWM

Like the science we study and share, GROW is evolving and expanding quickly, and we decided it was time for our website to...

Grow News Harvest Weed Seed Control Integrated Weed Management Innovations Herbicide Resistant Weeds Cover Crops DIGITAL AGRICULTURE Precision Weed Management

Evaluating a New Weed Killer: Blue Light and Heat

March 5, 2024 Grow IWM

Harvest weed seed control is a growing area of interest and study for farmers and researchers looking to target weed seeds during...

Industry News Harvest Weed Seed Control Integrated Weed Management Innovations Herbicide Resistant Weeds Harvest Weed Seed Management

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...

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

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...

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

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...

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

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...

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

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

November 17, 2023 Grow IWM

This forum is now archived and available HERE. GROW will be hosting a Farmer Forum on December 4th, 2023, at 1 p.m. ET. Listen in...

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

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: