Best Fall and Winter Weed Pre-Emergent Herbicides

Fall is a critical period when it comes to weed control. How to deal with both winter annual weeds and perennial weeds, in addition also providing  growing tips and specific recommendations for choosing the best pre-emergent and post-emergent herbicides.

Preventing Winter Weeds

Cooler temperatures trigger the germination of winter annual weeds like Annual Bluegrass, Chickweed, Mallow and many others. To prevent infestations and maintain healthy turf throughout the fall and winter.  This is important to apply pre-emergent herbicide in specific time frames because fertilization times varies through out the year.

What you should know about Annual bluegrass:

  1. annual bluegrassLight green grassy weed with unsightly seed head. Grows well in moist, compacted soil.
  2. Germinates in late summer or early fall, as soil temperatures fall below 70 degrees.
  3. A strong seed producer – Each plant can produce 100 seeds in as few as 8 weeks.

The best method of control of the new infestations is by applying a pre-emergent herbicide before weeds germinate in mid August to mid September.

Pre-emergent herbicide applied in the spring will not control Annual Bluegrass or other winter annual weeds. It will be too late!

Perennial weeds, like Thistle?

Perennial Weeds are those that come back each year from existing roots. Fall is a good time to apply a post-emergent herbicide  because the chemical will be carried down to the root for complete kill.

Suggested Herbicides for Fall / Winter

The Best Pre-Emergent Herbicides:

  • Oxadiazon is a great granular option – safe in all turf and ornamentals.
  • Prodiamine  is the longest-lasting, as well as most economical due to lowest application rates.
More Lawn Tips:  How to Create Lawn Mowing Patterns

The Best Post-Emergent Herbicides:

For getting your lawn ready for winter call TLC Landscapes for custom quote.


Fall Lawn Care Schedule



Comments ( 3 )

  1. ReplySharilyn
    Thanks for the great gardening tips! :) I had a question though I was hoping you would please help me with... Can I use a plastic liner in a raised bed for vegetables?
  2. ReplyProlificAshley
    Educative post, Thanks for sharing this admin, I can now easily prevent infestations and maintain healthy turf throughout the fall and winter.
  3. ReplyChuck
    August or September huh? No wonder I always get weeds. Im applying it at rhw wrong time. Im definitely markint this on my calender from now on.

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