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For an established bermudagrass lawn, prodiamine, dithiopyr, and pendimethalin are common pre-emergent active ingredients for preventing crabgrass and other summer annual weeds. The right choice depends on the weed, local germination timing, lawn establishment stage, and the exact product label—not on a single nationwide “best” product.
Which pre-emergent active ingredient fits your weed problem?
Pre-emergents work by preventing susceptible weeds from establishing as they germinate. They are not a general fix for weeds that are already mature. Choose by target weed and confirm that the specific product is labeled for bermudagrass.
| Active ingredient | What it can help prevent | Key qualification |
|---|---|---|
| Prodiamine | Grasses and some small-seeded broadleaf weeds, including summer annual grassy weeds. | Texas A&M lists it for bermudagrass lawns; Barricade is an example product family. Check the current product label for the exact formulation and use. Texas A&M AgriLife Extension; University of Nebraska–Lincoln Extension |
| Dithiopyr | Grasses and some small-seeded broadleaves; it can also control crabgrass shortly after germination. | The early post-emergence window is limited to crabgrass at an early stage; it is not a general mature-weed killer. Dimension is an example product family. Texas A&M AgriLife Extension; University of Nebraska–Lincoln Extension; University of Florida IFAS Extension |
| Pendimethalin | Annual grasses and some small-seeded weeds in labeled programs. | Some formulations may stain concrete or brick pavers; follow application and cleanup directions. Pendulum is an example product family. Texas A&M AgriLife Extension; University of Nebraska–Lincoln Extension; University of Florida IFAS Extension |
| Isoxaben | Broadleaf weeds. | It does not control grassy weeds such as crabgrass or annual bluegrass, so it is not the choice for those problems. Texas A&M AgriLife Extension |
When to apply pre-emergent on bermudagrass
Apply before the target weed germinates. The useful window depends on your region and the weed species, so a date recommended for one state should not be treated as a national schedule.
- Nebraska Extension describes traditional crabgrass-label timing in the north-central United States as about two weeks before germination, with its regional calendar placing that period around April to early May. Nebraska Extension
- Oklahoma State’s consumer bermudagrass calendar recommends January 1 to March 5 for the first crabgrass pre-emergent application in Oklahoma. Oklahoma State University Extension
- Clemson recommends a selective annual-grass or broadleaf pre-emergent labeled for bermudagrass during late winter and spring to reduce many weeds the following summer. Clemson Cooperative Extension
Use local extension guidance and the target weed’s emergence pattern to plan timing, then follow the product label. If the weed has already germinated, a pre-emergent may have missed its prevention window.
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#1 Best Overall
The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control - Covers up to 12,880 sq ft (40 lb)
- Designed to prevent weeds; will not aid in eliminating existing weeds. Prevents grassy and broadleaf weeds, including crabgrass, poa annua, goosegrass, henbit, and more.
- Contains 0.48% of the active ingredient prodiamine for professional-grade weed control for early spring and fall applications
- Made with patented DG Technology (dispersible granule) ensures granules dissolve rapidly upon watering, moving weed control directly into the soil for maximum impact
- Small particles for more coverage per square inch and superior performance
- Made in the USA
How to choose a product and apply it responsibly
- Identify the weed. Decide whether you are trying to prevent crabgrass or another annual grass, a small-seeded broadleaf, or a different weed. Active ingredients do not have interchangeable spectra.
- Check turf eligibility. Confirm the label names bermudagrass and allows use at your lawn’s establishment stage. Newly seeded or otherwise newly established turf may face product-specific waiting periods or restrictions.
- Match the timing to your area. Consult local extension recommendations for the target weed; do not apply another region’s calendar date without checking its relevance.
- Read the entire current label. Use its directions for rate, repeat applications, watering, application method, eligible turf, and reseeding intervals. These requirements vary by product and are not safely generalized across active ingredients.
- Choose a practical formulation. Granular products require suitable spreading equipment; liquid products require the appropriate application equipment. For products containing pendimethalin or prodiamine, check whether the formulation has hardscape-staining cautions and follow its cleanup instructions.
What pre-emergent cannot do
Except for dithiopyr’s limited early activity against crabgrass shortly after germination, these products should be selected and timed for prevention rather than treatment of established weeds. Isoxaben does not address grassy weeds such as crabgrass or annual bluegrass. If weeds are already growing, identify them and look for a labeled control approach appropriate to that weed and your lawn instead of assuming a pre-emergent will remove them.
Quick Recap
Bestseller No. 1
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SaleBestseller No. 4
Best Value
Sale
Scotts Halts Crabgrass & Grassy Weed Preventer, 10.06 lbs.
- One application prevents crabgrass all season long
- Apply in spring to prevent crabgrass and problem weeds all season long
- Fall application prevents winter weeds, such as poa annua, henbit and chickweed
- Rain, snow or freezing weather after application won't affect product performance
- Apply in fall to prevent moss
Rank #4
Sale
0-0-7 Granular Prodiamine Pre-Emergent Herbicide Fertilizer - 18lbs Covers 6,000 sq ft at 3 lbs/1,000 sq ft - Great for preventing crabgrass, POA annua (Annual Bluegrass), and More
- Prevent Weeds
- Effective Weed Prevention: Incorporating 0.37% PRODIAMINE into your lawn care routine ensures effective strategies for weed prevention, particularly targeting common weeds like crabgrass in the spring and poa annua (annual bluegrass) in the fall.
- Suitable for ALL GRASS TYPES: This product is suitable for use with various grass types, including Bahiagrass, Centipedegrass, Bermudagrass, Zoysia, St. Augustinegrass, Seashore Paspalum, and Tall Fescue (including turf-type), making it versatile for different lawn environments.
- CRABGRASS PREVENTION: It effectively prevents the growth of crabgrass, poa annua (annual bluegrass), and other common weeds, ensuring a healthier and cleaner lawn throughout the seasons.
- CANNOT SHIP TO MAINE OR IOWA**
Rank #3
Barricade 4FL Herbicide Concentrate - Preemergent Weed Control - Long Lasting Broadleaf Weed Prevention for Lawns, Turf Grass, Ornamentals, and More, 4 Fl Oz
- PREVENT WEED DEVELOPMENT: Barricade 4FL controls the growth and development of weeds before they germinate. Barricade 4FL will not control weeds after they have germinated. This product is labeled for use in a broad range of areas such as vegetation sites, turf species, weed control, grass, broadleaf weeds, established turfgrasses, lawns, sod nurseries, and Christmas tree farms.
- LONG-LASTING PREEMERGENCE WEED PREVENTION: Take action before unsightly vegetation infiltrates your landscaped lawn with our pre-emergent concentrate. One application can prevent weeds season long when used as directed. You can apply this selective weed spray solution several months before germination and expect it to work well into the peak season.
- ULTRA EFFECTIVE: You can use more Barricade for season-long targeted weed control and modulate your use during shorter growing seasons. It's the ideal weed prevention solution for your container, field-grown, and landscape ornamentals.
- BROAD-SPECTRUM HERBICIDE: The weed grass killer is super effective on residential turf, production, and landscape ornamentals. This grass killer can tackle up to 30 species of turf weeds, including both summer and winter annuals. It's all you need to clear your lawn of pesky weeds.
- INHIBITS GROWTH: Our herbicide for lawns prevents weed growth and development. This weed preventer focuses on controlling preventing pesky grass and weeds to the root in one swift application. Please note that Barricade must be applied before the targeted weeds germinate and emerge.
Rank #2
The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control - Covers up to 5,800 sq ft (18 lb)
- Designed to prevent weeds; will not aid in eliminating existing weeds. Prevents grassy and broadleaf weeds, including crabgrass, poa annua, goosegrass, henbit, and more.
- Contains 0.48% of the active ingredient prodiamine for professional-grade weed control for early spring and fall applications
- Made with patented DG Technology (dispersible granule) ensures granules dissolve rapidly upon watering, moving weed control directly into the soil for maximum impact
- Small particles for more coverage per square inch and superior performance
- Made in the USA
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
