Four Inches is Definitely Tall Enough

May 24, 2023


Post-emerge herbicides need to be applied when weeds are small.
If you see four-inch weeds when you scout fields in the next few weeks, your window to control them is closing fast!
 
“Most [post-emerge products] are labeled for spraying small, actively growing weeds,” said Kevin Carlson, Federated’s agronomy sales manager. “It’s all about coverage. Smaller weeds are easier to get coverage on; two-inch weeds can be controlled much more easily than six-inch weeds,” he said.
 
If a pre-emerge herbicide was applied, there’s “a little more grace” in the situation, said Carlson. “We know that something is working on the weeds already.” Without a pre-emerge, the weed-control window shuts even more quickly.
 
When you see the weeds creep toward that four-inch mark, get going with your herbicide applications. Call your local Federated Agronomist or Federated location. And remember: Weeds are feeding on the same nutrients your crop needs!
 

Read More News

May 12, 2026
The best execution of your plans starts with proper planter setup.
May 12, 2026
Federated Agronomy Sales Manager Kevin Carlson breaks down how to tell if it’s time to plant, and what to monitor immediately after your seed is in the ground.
May 12, 2026
Whether you rent or own your fertilizer spreader, check your settings for the healthiest crop.

Related Topics