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
Cereal Rye Smothers Weeds Above and Belowground
Thin cereal rye cover crop stand got you down? Don’t write it off just yet – cereal rye stands that struggle to produce a...
Cover Crops
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Planting Green into Cover Crops? Learn Which Soil Residual Herbicides Can Make it to the Ground!
The Wisconsin Cropping Systems Weed Science Program has been conducting extensive research on soybean “planting green”...
Cover Crops
Herbicide Management
Take Action
Glyphosate-Resistant Italian Ryegrass in New York: What Growers Need to Know
Glyphosate has long been a go-to tool for terminating cover crops and controlling weeds. But in New York, that tool is starting...
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Manage Weeds in Early-Planted Soybeans in the Upper Midwest
When weather lets you plant your soybeans early, you might be left wondering how your weed control and crop yield fares as a...
Herbicide Management
Herbicide Resistant Weeds
Take Action
Use this GROW Tool to Learn How Many Effective Herbicide Modes of Action You Actually Use
“Mix and rotate multiple herbicide modes of action each year,” the decades-old advice goes. But that wisdom is...
DIGITAL AGRICULTURE
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Crisis at the Bird Feeder: Palmer and Waterhemp Move West Through Contaminated Seed
Thurman Johnson went to a Spokane, Washington Safeway on August 22, 2025 to gear up for a day of removing invasive garden...
Harvest Weed Seed Management
Herbicide Resistance
Herbicide Resistant Weeds
Industry News
Prevention
Take Action
Gauge Your Cover Crop Biomass with These Sampling Methods
A cover crop stand bursting with 5,000 lbs per acre of biomass can be a boon for weed suppression. But how do you know when your...
Cover Crops
Grow News
Researchers Test Novel Weed Electrocution Devices in Row Crops
Row crop farmers might someday have more than one way to shock their weeds into submission. Currently, row crop farmers...
Grow News
Integrated Weed Management Innovations
Mechanical Weed Control
Weed Electrocution
Battle of the Bots: AI Takes on Weed Management Questions
Proponents of AI-powered chatbots promise they are there to lighten the mental load for humans, so we put them to the test: How...
DIGITAL AGRICULTURE
Grow News
Herbicide Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Farmer Forum Recap: Cover Crop Mixes for Weed Suppression
In GROW’s first Farmer Forum of 2026, a panel of farmers shared insights from their longtime and extensive use of cover crop...
Cover Crops
Grow News
Integrated Weed Management Innovations
Researchers Pinpoint When and How to Terminate Cover Crops in the Mid-Atlantic
Cover crop management is complex, but two recent studies could help clarify two important management factors for mid-Atlantic...
Cover Crops
Grow News
Farmers Crown Waterhemp “Worst Weed” at Commodity Classic
For three days, a trio of weeds fought fiercely for the title of “Worst Weed’ at the 2026 Commodity Classic in San Antonio,...
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Take Action
Cereal Rye Smothers Weeds Above and Belowground
Thin cereal rye cover crop stand got you down? Don’t write it off just yet – cereal rye stands that struggle to produce a...
Cover Crops
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Planting Green into Cover Crops? Learn Which Soil Residual Herbicides Can Make it to the Ground!
The Wisconsin Cropping Systems Weed Science Program has been conducting extensive research on soybean “planting green”...
Cover Crops
Herbicide Management
Take Action
Gauge Your Cover Crop Biomass with These Sampling Methods
A cover crop stand bursting with 5,000 lbs per acre of biomass can be a boon for weed suppression. But how do you know when your...
Cover Crops
Grow News
Farmer Forum Recap: Cover Crop Mixes for Weed Suppression
In GROW’s first Farmer Forum of 2026, a panel of farmers shared insights from their longtime and extensive use of cover crop...
Cover Crops
Grow News
Integrated Weed Management Innovations
Researchers Pinpoint When and How to Terminate Cover Crops in the Mid-Atlantic
Cover crop management is complex, but two recent studies could help clarify two important management factors for mid-Atlantic...
Cover Crops
Grow News
Join a GROW Farmer Forum on Using Cover Crop Mixes for Weed Suppression
GROW will be hosting a Farmer Forum on Wednesday, March 25, 2026, at 11 a.m. EDT / 10 a.m. CDT. The forum’s farmer panel and...
Cover Crops
Grow News
Herbicide Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
Six Farmer Videos from GROW to Help You Manage Cover Crops
Spring brings a lot of management decisions for farmers who use cover crops, from juggling termination timing to managing...
Cover Crops
Grow News
Integrated Weed Management Innovations
Spring is Coming. Time to Stock Up on GROW’s Weed Management Planners!
The groundhog was skeptical, but spring is coming, and with it, dozens of crop and weed management decisions – burndown...
Cover Crops
Fact Sheets
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
How to Juggle Cover Crops, Residual Herbicides, and Moisture to Suppress Weeds in the Semiarid Great Plains
Two crucial factors are limiting weed control options and pushing no-till farmers in the Central Great Plains into a corner:...
Cover Crops
Grow News
Herbicide Management
Herbicide Resistant Weeds
Stack Cover Crops with Residual Herbicides to Conquer Italian Ryegrass
By the time North Carolina farmers noticed that their Italian ryegrass wasn’t responding to paraquat in October of 2020, it had...
Cover Crops
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Researchers Pinpoint Goldilocks Zone for Cover Crop Termination in Corn in the Mid-Atlantic
Cover crops have proven they can smother weeds, but that suppression depends on two factors: their biomass accumulation and when...
Cover Crops
Grow News
Could We Shock Cover Crops for Termination?
Listen to this article above! Who said that electrocution is just for weeds? “If these electrical weeders can do a good job of...
Cover Crops
Grow News
Herbicide Resistance
Mechanical Weed Control
Weed Electrocution
Glyphosate-Resistant Italian Ryegrass in New York: What Growers Need to Know
Glyphosate has long been a go-to tool for terminating cover crops and controlling weeds. But in New York, that tool is starting...
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Use this GROW Tool to Learn How Many Effective Herbicide Modes of Action You Actually Use
“Mix and rotate multiple herbicide modes of action each year,” the decades-old advice goes. But that wisdom is...
DIGITAL AGRICULTURE
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Gauge Your Cover Crop Biomass with These Sampling Methods
A cover crop stand bursting with 5,000 lbs per acre of biomass can be a boon for weed suppression. But how do you know when your...
Cover Crops
Grow News
Researchers Test Novel Weed Electrocution Devices in Row Crops
Row crop farmers might someday have more than one way to shock their weeds into submission. Currently, row crop farmers...
Grow News
Integrated Weed Management Innovations
Mechanical Weed Control
Weed Electrocution
Battle of the Bots: AI Takes on Weed Management Questions
Proponents of AI-powered chatbots promise they are there to lighten the mental load for humans, so we put them to the test: How...
DIGITAL AGRICULTURE
Grow News
Herbicide Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Farmer Forum Recap: Cover Crop Mixes for Weed Suppression
In GROW’s first Farmer Forum of 2026, a panel of farmers shared insights from their longtime and extensive use of cover crop...
Cover Crops
Grow News
Integrated Weed Management Innovations
Researchers Pinpoint When and How to Terminate Cover Crops in the Mid-Atlantic
Cover crop management is complex, but two recent studies could help clarify two important management factors for mid-Atlantic...
Cover Crops
Grow News
Farmers Crown Waterhemp “Worst Weed” at Commodity Classic
For three days, a trio of weeds fought fiercely for the title of “Worst Weed’ at the 2026 Commodity Classic in San Antonio,...
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Take Action
Join a GROW Farmer Forum on Using Cover Crop Mixes for Weed Suppression
GROW will be hosting a Farmer Forum on Wednesday, March 25, 2026, at 11 a.m. EDT / 10 a.m. CDT. The forum’s farmer panel and...
Cover Crops
Grow News
Herbicide Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
Six Farmer Videos from GROW to Help You Manage Cover Crops
Spring brings a lot of management decisions for farmers who use cover crops, from juggling termination timing to managing...
Cover Crops
Grow News
Integrated Weed Management Innovations
Spring is Coming. Time to Stock Up on GROW’s Weed Management Planners!
The groundhog was skeptical, but spring is coming, and with it, dozens of crop and weed management decisions – burndown...
Cover Crops
Fact Sheets
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
Seed Impact Mills Tackle Volunteers in Small Grains Fields
What do you do when your own crop strikes back? That’s the problem faced by many small grains farmers, who find themselves...
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Integrated Weed Management Innovations
Mechanical Weed Control
Cereal Rye Smothers Weeds Above and Belowground
Thin cereal rye cover crop stand got you down? Don’t write it off just yet – cereal rye stands that struggle to produce a...
Cover Crops
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Glyphosate-Resistant Italian Ryegrass in New York: What Growers Need to Know
Glyphosate has long been a go-to tool for terminating cover crops and controlling weeds. But in New York, that tool is starting...
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Manage Weeds in Early-Planted Soybeans in the Upper Midwest
When weather lets you plant your soybeans early, you might be left wondering how your weed control and crop yield fares as a...
Herbicide Management
Herbicide Resistant Weeds
Take Action
Use this GROW Tool to Learn How Many Effective Herbicide Modes of Action You Actually Use
“Mix and rotate multiple herbicide modes of action each year,” the decades-old advice goes. But that wisdom is...
DIGITAL AGRICULTURE
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Crisis at the Bird Feeder: Palmer and Waterhemp Move West Through Contaminated Seed
Thurman Johnson went to a Spokane, Washington Safeway on August 22, 2025 to gear up for a day of removing invasive garden...
Harvest Weed Seed Management
Herbicide Resistance
Herbicide Resistant Weeds
Industry News
Prevention
Take Action
Battle of the Bots: AI Takes on Weed Management Questions
Proponents of AI-powered chatbots promise they are there to lighten the mental load for humans, so we put them to the test: How...
DIGITAL AGRICULTURE
Grow News
Herbicide Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Farmers Crown Waterhemp “Worst Weed” at Commodity Classic
For three days, a trio of weeds fought fiercely for the title of “Worst Weed’ at the 2026 Commodity Classic in San Antonio,...
Grow News
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
Take Action
Join a GROW Farmer Forum on Using Cover Crop Mixes for Weed Suppression
GROW will be hosting a Farmer Forum on Wednesday, March 25, 2026, at 11 a.m. EDT / 10 a.m. CDT. The forum’s farmer panel and...
Cover Crops
Grow News
Herbicide Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
Spring is Coming. Time to Stock Up on GROW’s Weed Management Planners!
The groundhog was skeptical, but spring is coming, and with it, dozens of crop and weed management decisions – burndown...
Cover Crops
Fact Sheets
Grow News
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
How to Juggle Cover Crops, Residual Herbicides, and Moisture to Suppress Weeds in the Semiarid Great Plains
Two crucial factors are limiting weed control options and pushing no-till farmers in the Central Great Plains into a corner:...
Cover Crops
Grow News
Herbicide Management
Herbicide Resistant Weeds
Glufosinate-Resistant Waterhemp Confirmed in Illinois
This article is reprinted with permission from the University of Illinois FarmDoc. Weed scientists at the University of Illinois...
Herbicide Management
Herbicide Resistance
Herbicide Resistant Weeds
News From Other Sources
Listen In: HERMON Project Aims to Rapidly ID and Map Herbicide Resistance for Farmers
Traditional herbicide-resistance testing takes months and often outpaces the time you have to make decisions about what to spray...
Herbicide Resistance
Herbicide Resistant Weeds
Industry News
Take Action
Seed Impact Mills Tackle Volunteers in Small Grains Fields
What do you do when your own crop strikes back? That’s the problem faced by many small grains farmers, who find themselves...
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Integrated Weed Management Innovations
Mechanical Weed Control
GROW’s New Harvest Weed Seed Control Webpage Makes Understanding HWSC Simple
Harvest weed seed control (HWSC) is an Australian-born weed management system that is gaining traction in the U.S., as more...
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
Tame Wild Oats with Early-Maturing Crop Rotations and Harvest Weed Seed Control in the Canadian Prairies
If you could outrun wild oat in your field, would you? Canadian Prairie farmers are battling herbicide-resistant wild oat in...
Harvest Weed Seed Control
Harvest Weed Seed Management
Herbicide Management
Herbicide Resistant Weeds
Industry News
Mechanical Weed Control
Research Suggests Seed Impact Mills Could Clean Up Cotton Fields
When Sarah Chu began researching the efficacy of seed impact mills in cotton, she knew it might be an uphill battle. Seed impact...
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Mechanical Weed Control
This Harvest Device Catches Corn Kernels and Weed Seeds
Listen to this article above! Harvest weed seed control has proven a successful way to reduce your weed seedbank in small-grain...
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Integrated Weed Management Innovations
Mechanical Weed Control
Can Chaff Lining Cut Costs and Corral Weeds in the Canadian Prairies?
It can be tricky to find weed management methods that lower herbicide inputs but still work for your production system if...
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Integrated Weed Management Innovations
Mechanical Weed Control
A Handheld Extension Agent? GROW Researchers Put ExtensionBot to the Test
AI is sowing new possibilities in agriculture, from precision herbicide applications to mapping weeds and cover crops in fields....
Cover Crops
DIGITAL AGRICULTURE
Grow News
Harvest Weed Seed Control
Herbicide Management
Herbicide Resistant Weeds
Industry News
Mechanical Weed Control
Seed Impact Mill Pulverizes Problematic Waterhemp in New Study
Recently-published research has reinforced that “milling around” with seed impact mills can help keep escaped waterhemp from...
Grow News
Harvest Weed Seed Control
Harvest Weed Seed Management
Herbicide Management
Herbicide Resistant Weeds
Mechanical Weed Control
Weed Management Planner: Order Your Free Prints Now!
GROW’s Weed Management Planner is many things – color-coded, comprehensive, and packed with information! But we admit,...
Cover Crops
Fact Sheets
Grow News
Harvest Weed Seed Control
Herbicide Management
Integrated Weed Management Innovations
Mechanical Weed Control
Extension and Farmers Greet Weed Control Option with ‘G’day’
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
Harvest Weed Seed Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Mechanical Weed Control
GROW Releases New Herbicide Resistance Resource for the Industry
As herbicide resistance spreads, so must education on what it is and how to manage it. That’s the goal behind GROW’s newest...
Cover Crops
Grow News
Harvest Weed Seed Control
Herbicide Management
Herbicide Resistant Weeds
Integrated Weed Management Innovations
Precision Weed Management
Prevention
Weed Electrocution
Narrow Windrow Burning for Weed Seed Control is Risky Business
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
Harvest Weed Seed Management
Integrated Weed Management Innovations
Mechanical Weed 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 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:
Weed Management Planner
In the Fields
What Are Your Problem Weeds?
Morningglory Species
Chickweed (Common)
Purple Nutsedge
Crabgrass (Large)
Cocklebur (Common)
Yellow Nutsedge
Jimsonweed
Velvetleaf
Foxtail (Giant)
Broadleaf Signalgrass
Redroot & Smooth Pigweed
Texas Millet (Panicum)
