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:
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
*temperatures vary year to year so optimal application could vary from these dates
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.
An Interactive Soil Temperature Map by Syngenta is a handy tool.
$259.50 As low as: $241.50
Out of stock
Oust Extra, with a combination of Sulfometuron Methyl - 56.25%, Metsulfuron Methyl - 15% is flexible herbicide that can be sprayed with water or impregnated on dry, bulk fertilizer.It controls a broad spectrum of broadleaf weeds, troublesome brush, many annual and perennial grasses, vines, and certain woody plants. Apply Oust Extra as a both preemergent or post-emergent herbicide in noncrop sites and conifer plantations. For use in site preparation and release of varied conifers, Oust Extra clears unwanted brush and weeds.
Since Oust is long lasting; it reduces the need for reapplication. If you apply Oust Extra in winter or even early fall, it provides herbaceous weed control into the following spring.Learn More
Starting at: $186.29
Barricade 65 WG Herbicide, with prodiamine 65.0% is a pre-emergent water-dispersible granule herbicide for use in established turfgrass and other non-crop areas to control more than 30 weeds. This prodiamine product controls weeds such as crabgrass, barnyard grass, foxtails, chickweed, bluegrass, henbit, knotweed and more listed grassy and broadleaf weeds.
As a pre-emergent, Barricade 65 WG is applied before seeds germinate or the development of newly germinated seeds. Weeds that have already been established will not be touched by prodiam ine. Barricade 65 WG needs irrigation or rainfall of at least 0.5" within 14 days of application, to be most effective.Learn More
Starting at: $158.95
Out of stock
Surflan Flex T&O Herbicide is a new pre-emergent herbicide containing oryzalin. It uses the new proprietary transverse technology which allows optimal absorption into the soil matrix, resulting in enhanced weed control. This increased penetration into the soil is quite an improvement over previous Surflan formulations. It also includes new date ranges for applications, for increased flexibility with applications.
Surflan Flex is applied to the surface for the control of certain broadleaf weeds, many annual grasses in turf, ornamentals, Christmas tree plantations, non cropland areas and industrial sites Learn More
Starting at: $36.50
Esplande EZ controls existing weeds and prevents new weeds for up to 6 months after just one treatment. Esplanade EZ is a non-selective herbicide that controls more than 75 broadleaf and grassy weeds. With the combination of its active ingredients, it is both a pre-emergent and post-emergent herbicide and is rainproof in 30 minutes. It is perfect for use in non-crop areas like sidewalks, curbs, driveways, vacant lots, gravel areas, parking lots, paths, loading ramps, fence rows and managed roadsides as an easier way to control vast areas of weeds.Learn More
$18.95 As low as: $15.95
Bonide's Sedge Ender Concentrate kills yellow nutsedge, crabgrass, foxtail weeds, and other listed grassy weeds. Sedge Ender provides pre-emergent and post-emergent weed control, killing the toughest weeds, down to the root. Sedge Ender may be used on warm season and coool season grasses and is excellent in cool weathers. Sedge Ender is a selective pre emergence and post-emergence herbicide.Learn More
Starting at: $740.50
Out of stock
SureGuard Herbicide - Long Lasting
SureGuard Herbicide is a pre and post emergent herbicide for a broad spectrum of grassy and broadleaf weeds for landscape weed control. It keeps the weeds away from trees and shrubs in ornamental beds. It also may be used as a bare ground (soil sterilant) herbicide that lasts up to 8 months. As a pre-emergent herbicide, it provides suburb, long residual control of tough weeds such as spurge, bittercress, oxalis, common groundsel and crabgrass. Not only is it long lasting, but has very low use rate; I lb covers up to 2 acres.Learn More
$84.50 As low as: $81.40
Resolute 65 WG (water dispersable granule) - 5 lb. Compare Resolute 65 WG to Barricade 65 WDG . Both contain Prodiamine 65%.
Resolute 65 WG as a pre-emergent prevents new growth of weeds. Landscape professionals particulary like this product for crabgrass control.Learn More
$13.95 As low as: $10.05
This Vine and Stump Killer works quickly to kill stumps and vines. It also kills some broadleaf weeds. It is used to control undesirable woody vines, plants, and broadleaf weeds. It is safe for lawns. Because this Vine & Stump killer has a quick uptake, it acts quickly.Learn More
$149.90 As low as: $140.95
For a more economical alternative, with Dithiopyr - 40%, compare: Quali Pro's Dithiopyr 40 WSB
Dimension Ultra 40 WP is known as an excellent herbicide for pre-emergent and post emergent crabgrass control. It will also control other annual grasses and broadleaf weeds such as goosegrass, chickweed, Poa annua, and spurge for season-long control. According to its label, it will suppress or control 45 different broadleaf weeds and annual grasses. Dimension Ultra 40 WP as an over the top application label for nursery ornamental plants.
Except for crabgrass control (up to tillering stage of development), this product should be used as a pre-emergent only. Use this pre-emergent herbicide prior to germination of target weeds in spring, summer or fall. Half inch or more of rainfall or irrigation is needed to activate Dimension Ultra 40 WP.Learn More