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John Fulton

John Fulton
Former County Extension Director

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In The Backyard

Horticulture columns and tips done on a timely basis

Broadleaf Weed Control in the Fall

Posted by John Fulton -

Fall is a great time to try and control problem perennial weeds in the lawn. The weeds are in the process of storing energy in the roots and crowns so they can come out again next year. This translocation of food also provides a great way to move pesticides in the plants.

Problem perennial weeds would include things like ground ivy, violets, speedwell, and others. Of course, a treatment will also get dandelions and plantain. For most problem weeds, a combination of 2,4-D, MCPP, and dicamba will do the trick. There are many pre-mixed herbicides with these ingredients. Many are adding triclopyr to the mixture as well, and mainly for violet control. Try to pick a day when winds are slight, and when temperatures aren't predicted to be above 85 degrees for a while. Normally the late September time doesn't present the temperature problem, but this year seems to be an exception. The dicamba can vapor drift after application. Many gardens are about done, but flowers, shrubs, and trees are also translocation food. You need to be cautious whenever applying chemicals. Read the label and follow all recommendations.

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