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Pre-Emergent Herbicides

Pre-emergent Herbicides

Pre-emergent Herbicides are the best way to reduce and eliminate weeds in your lawn. Pre-emergent Herbicides work by preventing weed seed germination. They create a layer that kills the weeds as they try to push past the top layer of soil.

The key to using pre-emergent herbicides is proper timing.  There are two times of the year to apply your pre-emergent herbicides, the spring and the fall.   When to apply these during that time period depends on your geographic location, you can contact your local county extension for the best times to apply.   Most spring and summer weeds will germinate when the soil temperature at 4 inches down reaches about 52 to 55 degrees F for three or four consecutive days.

Some popular weeds that can be effectively controlled by pre-emergents include but are not limited to:

Spring Application

Early Spring Application:  Many of the pre-emergent herbicides have similar qualities and control the same broad and grassy weeds.  When applied at the correct time they are very effective and we recommend our top products such as these:

Other products include:

Late Spring Application:  If you are applying pre-emergent later in the season, the best option would be to use pre-emergents that have post emergent qualities to control the seeds that have already germinated and have already sprouted.  Our top products include:

Other products include:

Spring Application Chart

Pre-emergent herbicide spring application map

 *temperatures vary year to year so optimal application could vary from these dates

 

Fall Application

Early Fall Application:  When applying pre-emergents in late summer and early fall we would recommend using the same products as Late Spring Application.  This way you can control the already existing weeds and prevent any further growth. 

Mid to Late Fall Application:  When applying pre-emergents in this part of the year we would recommend using the same products as Early Spring Application.  

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  1. Complete Lawn Starter Kit
    $105.25

    This complete lawn starter kit will cover pre-emergent, post-emergent, and spot applications for a year long package. It also includes Herbicide Helper to improve the wetting of the foliage.

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  2. Dithiopyr 40 WSB

    Compare Dithiopyr 40WSB Herbicide to Dimension Ultra 40 WP, ( both contain Dithiopyr 40.0%). Dithiopyr 40 WSB is more economical.

    Dithiopyr 40 WSB is an excellent herbicide for pre-emergent control of crabgrass. Other important grasses include kikuyugrass, goosegrass, chickweed, annual bluegrass, barnyard grass, oxalis, ryegrass, spurge. See the product label for all the listed annual grasses and broadleaf weeds. It may be used on established turf, field-grown nurseries, golf courses, landscape ornamentals and more listed locations.

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  3. Birchmeier Granomax 5 Spreader
    $51.98

    Birchmeier Granomax 5 over the shoulder spreader spreads fertilizers, granules, grass seed, rock salt, etc. It quickly and evenly spreads these granulated items with its spread head's unique design. It is effective in both broadcast or spot applications and has a five-stage rate control.

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  4. Hi-Yield Weed and Grass Stopper -12 lbs #33030

    Starting at: $17.15

    Hi-Yield Weed and Grass Stopper (contains Dimension Herbicide) Learn More
  5. Concern Weed Prevention Plus for Lawn Care 8-2-4

    Starting at: $46.50

    Concern Weed Prevention Plus for Lawn Care 8-2-4 with 100% natural corn gluten is a pre-emergent herbicide plus a fertilizer of bone meal and sulfate to gently fertilize your lawn for green and lush grass. As a pre-emergent, it controls up to 90% of weed control in the first year on dandelions and crabgrass and other listed weeds. It combines corn gluten meal (82%), nitrogen (8%), phosphate (2%) and potash (4%) for a all-in-one product. However, if you have existing weeds, it will not stop their growth.

    To make sure that the corn gluten absorbs into the ground, water in after application. After that, it is best to have a few dry days (rain-free) for a couple of days. Wait for 6 weeks for an application if you have newly seeded lawns.

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  6. Pendulum 2G Granule Herbicide

    Starting at: $64.95

    Pendulum 2 G, with pendimethalin is a granulated herbicide that is an economical choice for a pre-emergent coverage in turf areas and around ornamentals. Pendulum 2G is applied at the rate of 1.7 to 4.6 lbs. per 1,000 square ft. or 75-100 lbs per acre. Pendulum 2G controls over 40 different broadleaf and grassy weeds. With over 335 listed ornamentals, Pendulum 2G is safe around and over the top of listed annual, perennial and woody ornamentals, with university specialists recommending its crop safety.

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  7. Prodiamine 65 WDG

    Prodiamine 65 WDG is a wettable dispersible granule ( WDG ) . As a pre-emergent herbicide, the versatility of Prodiamine 65 WDG allows applications both in spring and fall seasons for year long control .This Quali-Pro herbicide is particularly effective against many of the hard-to-kill grassy weeds such as crabgrass and annual bluegrass.

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