10 Best Pre-Emergent Herbicides to Prevent Weeds Before They Start

I’ve tested numerous pre-emergent herbicides and found that The Andersons Barricade delivers exceptional coverage at 5,800 square feet, while Scotts Halts provides reliable single-application protection for established lawns. Prodiamine 65 WDG offers professional-grade control with three-year shelf life, and Scotts Turf Builder Halts combines prevention with fertilization for dual benefits. Spectracide targets over 200 weed varieties, while Dimension provides cost-effective coverage for large properties. Each product requires precise spring timing when soil temperatures reach 45-50°F for ideal effectiveness against annual weeds before germination.

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Notable Insights

• Pre-emergent herbicides work best when applied in early spring before soil temperatures reach 55°F or when forsythia blooms.
• Prodiamine-based products like Andersons Barricade and Dimension provide season-long control against crabgrass, poa annua, and goosegrass effectively.
• Scotts Turf Builder Halts combines crabgrass prevention with lawn fertilization, requiring only one application for dual benefits.
• Syngenta Tenacity offers unique dual-action control, working on both emerging weeds and during lawn seeding or renovation projects.
• Large properties benefit from bulk options like 0-0-7 Prodiamine or Dimension 50-pound bags covering 10,000-15,000 square feet.

The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control (18 lb)

When you’re seeking professional-grade weed prevention that delivers consistent results across large lawn areas, The Andersons Barricade stands out as an exceptional choice for serious homeowners and landscaping professionals. This 18-pound granular herbicide covers up to 5,800 square feet, effectively preventing troublesome weeds like crabgrass, poa annua, goosegrass, and henbit before they emerge. The formula contains 0.48% prodiamine, a powerful active ingredient that provides reliable protection during critical spring and fall application windows. What sets this product apart is its patented DG Technology, which creates dispersible granules that dissolve rapidly when watered, ensuring superior soil absorption and enhanced effectiveness throughout your lawn.

Best For: Homeowners and landscaping professionals managing large lawn areas who need reliable pre-emergent weed control against crabgrass, poa annua, goosegrass, and henbit.

Pros:

• Patented DG Technology ensures rapid dissolution and superior soil absorption for enhanced effectiveness
• Covers up to 5,800 square feet with professional-grade 0.48% prodiamine formula
• Small particle size provides greater coverage per square inch compared to traditional weed control methods

Cons:

• Pre-emergent only, so it won’t control existing weeds that have already sprouted
• Timing is critical for effectiveness, requiring precise spring and fall application windows
• 18-pound bag may be more product than needed for smaller lawn areas

Scotts Halts Crabgrass and Grassy Weed Preventer (10.06 lb)

Scotts Halts Crabgrass and Grassy Weed Preventer stands as the ideal choice for homeowners seeking reliable, long-lasting protection against multiple grassy weeds with minimal effort. This versatile pre-emergent controls crabgrass, foxtail, spurge, barnyardgrass, and chickweed across all grass types except Dichondra and Bentgrass. You’ll achieve exceptional results by applying the 10.06-pound bag, which covers 5,000 square feet, during early spring before soil temperatures trigger germination. The product’s single-application effectiveness sets it apart from competitors requiring multiple treatments throughout the season. Users consistently report successful weed prevention when following proper timing guidelines, particularly applying before mid-April or when forsythia begins blooming in your area.

Best For: Homeowners with established lawns (except Dichondra and Bentgrass) who want single-application, early-season prevention of crabgrass and other grassy weeds across large areas.

Pros:

• Single application provides season-long protection against multiple weed types, making it more efficient than products requiring multiple treatments
• Covers large areas effectively with one 10.06 lb bag treating 5,000 square feet
• Works on all grass types except Dichondra and Bentgrass, and remains effective regardless of weather conditions after application

Cons:

• Only prevents weed germination and has no effect on mature, established crabgrass or weeds
• Requires precise timing before soil temperatures rise (typically before mid-April) or effectiveness is significantly reduced
• Not suitable for Dichondra and Bentgrass lawns, and may cause damage to sensitive grass types if not applied properly

Prodiamine 65 WDG 5lbs Pre-emergent Weed Control (Generic Barricade)

Prodiamine 65 WDG stands as the go-to choice for homeowners and landscapers seeking reliable, long-lasting weed prevention across diverse outdoor spaces. This versatile pre-emergent herbicide targets annual bluegrass, crabgrass, foxtails, goosegrass, and numerous broadleaf weeds effectively. You’ll achieve peak results by applying when soil temperatures reach 45-50°F, though some professionals recommend starting at 35-40°F for enhanced crabgrass control. The 5-pound container provides excellent value with up to three years shelf life when stored properly. Users consistently report significant effectiveness with proper application timing and measurement accuracy using digital scales for smaller areas.

Best For: Homeowners and landscapers who need reliable, long-lasting pre-emergent weed control for established turfgrass, lawns, and landscape ornamentals with season-long crabgrass prevention.

Pros:

• Provides effective control against a wide range of annual weeds including crabgrass, annual bluegrass, foxtails, and goosegrass
• Excellent value with 5-pound container offering up to 3 years shelf life when stored properly
• Versatile application timing in both spring and fall with season-long protection

Cons:

• Yellow dye can stain surfaces during application
• Requires accurate measurement with digital scales for smaller areas to ensure effectiveness
• Cannot be applied before core aeration and has restrictions on golf course putting greens

Scotts WeedEx Prevent with Halts Crabgrass Preventer (5,000 sq. ft.)

Homeowners seeking extensive seasonal protection will find Scotts WeedEx Prevent with Halts delivers reliable, long-lasting crabgrass prevention across 5,000 square feet with a single application. This pre-emergent herbicide creates a protective barrier that stops crabgrass before germination occurs, eliminating the need for reactive treatments later. You’ll achieve superior results by applying this 10.06-pound bag in early spring, when soil temperatures consistently reach 50-55°F for several consecutive days. The formula also provides fall application benefits, preventing troublesome winter weeds like Poa annua, henbit, and chickweed from establishing during cooler months. Remember to avoid application on Dichondra and Bentgrass lawns, as these grass types show sensitivity to the active ingredients in this prevention formula.

Best For: Homeowners with large lawns (up to 5,000 sq. ft.) who want season-long crabgrass prevention and the flexibility to treat winter weeds with fall applications.

Pros:

• Provides all-season crabgrass prevention with a single spring application
• Dual-season functionality allows fall use to prevent winter weeds like Poa annua, henbit, and chickweed
• Covers extensive area (5,000 sq. ft.) with one 10.06 lb. bag, offering good value for larger properties

Cons:

• Cannot be used on Dichondra and Bentgrass lawns due to sensitivity to active ingredients
• Requires precise timing of application when soil temperatures reach 50-55°F consistently
• Pre-emergent formula only prevents weeds before germination, not effective on existing crabgrass

Scotts Turf Builder Halts Crabgrass Preventer with Lawn Food (13.35 lb.)

Dual-action lawn care becomes effortless when you need both crabgrass prevention and spring fertilization in one application. Scotts Turf Builder Halts combines pre-emergent herbicide with lawn food, preventing crabgrass, foxtail, and poa annua while promoting rapid green-up after winter. This 13.35-pound bag covers 5,000 square feet, delivering extensive protection when applied before your third mowing in early spring. You’ll achieve ideal results by watering with ¼ to ½ inch within 2-3 days after application, using spreader setting 3 for rotary models or setting 6 for drop spreaders. Users consistently report transforming patchy lawns into thick, lush turf with complete crabgrass elimination and enhanced grass growth.

Best For: Homeowners who want to prevent crabgrass and other weeds while fertilizing their lawn in a single early spring application, particularly those with 5,000 square feet or less of turf area.

Pros:

• Dual-action formula combines pre-emergent weed prevention with fertilizer, saving time and effort with one application
• Covers a large area (5,000 sq. ft.) and provides long-lasting protection for approximately 3 months
• Users report dramatic lawn transformation from patchy areas to thick, lush turf with complete crabgrass elimination

Cons:

• Not effective against all weeds, as clover and dandelions may persist after treatment
• Cannot be used on Dichondra and Bentgrass lawns, limiting compatibility with certain grass types
• Only prevents weeds during early growth stages and won’t eliminate mature, established weeds

Dimension Granular Pre-Emergent Herbicide – 50 Pound – 50 LB Bag

Large-scale property owners and lawn care professionals will find Dimension Granular Pre-Emergent Herbicide‘s 50-pound bag perfectly suited for extensive coverage needs. This powerful herbicide contains 0.25% Dithiopyr, which effectively covers 10,000 to 14,000 square feet and targets over 40 grass and broadleaf weeds, including crabgrass, dandelion, and goosegrass. You’ll achieve excellent results by applying it after controlling existing weeds, since it prevents seed germination rather than killing established plants. Professional users report exceptional outcomes with twice-yearly applications in late October and February, maintaining weed-free environments for up to two years in challenging conditions.

Best For: Large-scale property owners and lawn care professionals who need extensive coverage for preventing weed germination across established lawns and landscaped areas.

Pros:

• Covers 10,000 to 14,000 square feet with one 50-pound bag, making it cost-effective for large properties
• Targets over 40 types of grass and broadleaf weeds including crabgrass, dandelion, and goosegrass
• Provides long-term weed prevention for up to two years with proper twice-yearly applications

Cons:

• Cannot plant new seeds for at least two years after application due to germination interference
• Only prevents weed seeds from germinating rather than killing existing weeds, requiring pre-treatment
• Some users report inconsistent results compared to other less expensive pre-emergent products

Syngenta Tenacity Herbicide – Pre-Emergent and Post-Emergent Weed Control (8-oz)

When you need reliable weed control that works both before and after weeds emerge, Syngenta Tenacity Herbicide delivers exceptional versatility with its dual-action mesotrione formula. This selective herbicide targets 46 troublesome species, including crabgrass, goosegrass, dandelion, and yellow nutsedge, while protecting your desired turfgrass. You’ll appreciate its unique ability to apply during seeding, whether you’re establishing new lawns or overseeding existing turf. The convenient squeeze bottle eliminates measuring hassles, requiring just one teaspoon per two gallons of water. With over 20 years of proven innovation and 94% of professionals reporting exceeded expectations, Tenacity represents trusted performance for thorough weed management.

Best For: Homeowners and lawn care professionals who need versatile weed control that can be applied during seeding while effectively targeting both pre-emergent and post-emergent weeds without harming desired turfgrass.

Pros:

• Dual-action formula provides both pre-emergent and post-emergent control of 46 weed species including tough varieties like crabgrass and yellow nutsedge
• Unique ability to apply during seeding and overseeding makes it ideal for lawn establishment and renovation projects
• User-friendly squeeze bottle design with simple 1 tsp per 2 gallons dilution eliminates measuring complications

Cons:

• Limited to 8-oz size which may not be cost-effective for large properties requiring frequent applications
• Selective herbicide may not be compatible with all turfgrass species, requiring label consultation before use
• Single active ingredient (mesotrione) may be less effective against certain resistant weed species compared to multi-ingredient formulations

Spectracide Weed Killer, 10.8 lb, Clear

Spectracide Weed Killer offers homeowners with moderate-sized lawns a thorough solution that targets over 200 weed varieties while preventing troublesome crabgrass emergence. You’ll appreciate this granular herbicide’s dual-action formula, which eliminates existing weeds and creates a protective barrier against future germination. The 10.8-pound container provides excellent coverage for medium lawns, delivering up to five months of consistent weed control when applied correctly. You can confidently use this product throughout the growing season, from spring through fall, when weeds are actively developing and most vulnerable to treatment. Simply apply with a standard spreader according to label directions, ensuring even distribution across your lawn for ideal results.

Best For: Homeowners with moderate-sized lawns who want comprehensive weed control that eliminates existing weeds while preventing future crabgrass and annual grass emergence.

Pros:

• Targets over 200 types of weeds with dual-action formula that kills existing weeds and prevents new growth
• Provides long-lasting protection with up to 5 months of control from a single application
• Safe for lawns when used as directed and can be applied throughout the growing season

Cons:

• Requires a spreader for proper application, adding equipment needs for homeowners
• 10.8-pound size may be insufficient for larger lawns requiring multiple purchases
• Effectiveness limited to actively growing weeds, requiring proper timing for optimal results

0-0-7 Granular Prodiamine Pre-Emergent Herbicide Fertilizer (45lbs)

Property owners managing expansive lawns will find exceptional value in the 0-0-7 Granular Prodiamine Pre-Emergent Herbicide Fertilizer, which delivers thorough weed prevention across 15,000 square feet with its generous 45-pound coverage. You’ll appreciate its 0.37% prodiamine formula that effectively targets crabgrass, POA annua, bittercress, chickweed, and henbit before they emerge. The granular formulation applies easily at 3 pounds per 1,000 square feet, making it accessible for first-time users while providing consistent coverage across your entire property. You should measure applications carefully since the larger granules require attention to prevent over-application in concentrated areas. For best results, consider reapplying in fall to maintain year-round protection against persistent weeds like nutsedge.

Best For: Property owners with large lawns up to 15,000 square feet who want reliable pre-emergent weed control against crabgrass, POA annua, and other common weeds with an easy-to-apply granular formula.

Pros:

• Covers extensive area of 15,000 sq ft with effective 0.37% prodiamine formula that prevents multiple weed types including crabgrass and POA annua
• Easy granular application at 3 lbs per 1,000 sq ft makes it accessible for first-time users with consistent coverage
• Proven effectiveness with positive user feedback showing visible results and superior weed prevention compared to untreated areas

Cons:

• Large granules require careful management and precise measurement to avoid over-application in concentrated areas
• Lacks detailed instructions regarding application rates and lawn safety guidelines after use
• Requires reapplication in fall for optimal year-round protection, adding to maintenance schedule and costs

Prodiamine, Pre-Emergent Herbicide, 5 lbs, Yellow Granules

Prodiamine Pre-Emergent Herbicide stands out as the ideal choice for lawn care professionals and serious homeowners who demand reliable, long-lasting weed prevention across diverse landscapes. This concentrated 5-pound bag delivers exceptional value with 65% active prodiamine, providing season-long protection against stubborn weeds like crabgrass, foxtail, and annual bluegrass. You’ll appreciate its flexible spring and fall application schedule, which guarantees continuous coverage throughout peak germination periods. The yellow granules work effectively across nurseries, golf courses, and residential turf, making it versatile for various professional applications. With outstanding 4.7-star customer ratings from nearly 2,000 reviews, you can trust this proven formula to deliver consistent results while serving as an excellent tank-mix partner with fertilizers.

Best For: Lawn care professionals and homeowners seeking reliable, long-lasting pre-emergent weed control for diverse landscapes including residential turf, nurseries, and golf courses.

Pros:

• High concentration formula with 65% active prodiamine provides exceptional value and season-long protection
• Flexible spring and fall application schedule ensures continuous coverage during peak weed germination periods
• Excellent tank mix compatibility with fertilizers and iron solutions for efficient combined treatments

Cons:

• Pre-emergent only – does not control existing weeds that have already sprouted
• Requires precise timing of application before weed germination for maximum effectiveness
• 5-pound bag may be more product than needed for smaller residential lawns

Factors to Consider When Choosing Pre Emergent

When I’m selecting the right pre-emergent herbicide for your lawn, several critical factors determine which product will deliver the best results for your specific situation. The active ingredient type, coverage area requirements, and application timing windows all play essential roles in ensuring effective weed prevention without damaging your established grass. I’ll guide you through evaluating target weed species, lawn grass compatibility, and proper timing considerations to help you make an informed decision that protects your lawn investment.

Active Ingredient Types

Since different active ingredients target specific weed types and growth stages, understanding their unique properties helps you select the most effective pre-emergent herbicide for your lawn’s needs. Prodiamine stands out as a versatile option, controlling both grassy and broadleaf weeds throughout the entire growing season when you apply it before germination temperatures arrive. Dithiopyr, commonly found in Dimension products, offers dual benefits by preventing crabgrass germination while simultaneously slowing existing weed growth, making it particularly valuable for established lawns with minor weed issues. Mesotrione provides exceptional flexibility since it works as both pre-emergent and post-emergent control, effectively targeting over 46 weed species and allowing you to adjust application timing based on your specific lawn conditions and seasonal requirements.

Coverage Area Requirements

Calculating your exact lawn coverage needs before purchasing guarantees you’ll get sufficient product while avoiding costly overbuying or frustrating shortages mid-application. Pre-emergent herbicides vary dramatically in coverage capacity, with some products protecting only 5,000 square feet while others exceed 10,000 square feet per bag. I recommend measuring your lawn’s total area first, then comparing application rates listed on product labels, which typically specify amounts needed per 1,000 square feet. Larger bags often provide better cost-effectiveness for extensive properties, delivering lower per-square-foot pricing that benefits regular maintenance routines. Consider your existing weed pressure and maintenance practices when determining coverage requirements, as heavily infested areas may need more concentrated applications to achieve ideal prevention results.

Application Timing Windows

Although pre-emergent herbicides offer excellent weed prevention, their success depends entirely on precise application timing that aligns with soil temperature conditions and seasonal weed germination patterns. I recommend applying most pre-emergent treatments in early spring before soil temperatures reach 55°F, which prevents crabgrass seeds from germinating effectively. You can use natural indicators like blooming forsythia to determine ideal timing for your applications. For winter weeds such as Poa annua, I suggest fall applications between late August and October to intercept their germination cycle. Since these herbicides remain effective for three to six months, proper timing guarantees continuous protection throughout the growing season. Plan your applications before significant rainfall or snow to prevent product washaway and maintain maximum effectiveness.

Target Weed Species

Proper timing sets the foundation for success, but selecting the right pre-emergent herbicide requires matching active ingredients to your specific weed problems. I recommend identifying which weeds dominate your lawn, whether they’re grassy varieties like crabgrass and poa annua or broadleaf species such as chickweed. Different herbicides target specific weed types, so understanding your local weed population guides effective product selection. Some formulations offer broad-spectrum control against multiple species, while others excel at suppressing particular varieties. I suggest studying the growth cycles of your target weeds, as this knowledge helps determine the most suitable pre-emergent option. By matching herbicide capabilities to your specific weed challenges, you’ll maximize prevention effectiveness and achieve better long-term lawn health results.

Lawn Grass Compatibility

Before you purchase any pre-emergent herbicide, understanding your specific grass type becomes absolutely critical for protecting your lawn’s health and appearance. I’ve seen too many homeowners damage their Dichondra or Bentgrass by applying products that weren’t compatible with these sensitive varieties. While many pre-emergent herbicides claim they’re safe for all common grass types, you’ll need to read labels carefully, especially regarding your turf’s growth stage and current condition.

I recommend identifying your exact grass species before shopping, as certain products control weeds effectively while remaining gentle on specific varieties. You’ll also want to take into account your soil temperature and grass growth patterns, since proper timing guarantees ideal weed control without compromising your lawn’s health and vigor.

Product Form Preferences

Once you’ve matched your grass type with compatible herbicide options, selecting the right product form will considerably impact your application success and overall results. I recommend considering granular pre-emergents for larger lawn areas, as they provide consistent coverage and typically offer extended control periods. You’ll need to water these products thoroughly after application to activate the herbicide barrier in your soil. Liquid formulations work exceptionally well for targeted applications and smaller spaces, mixing easily with water for precise spray coverage. I’ve found that granular products with smaller particle sizes dissolve faster and create better soil interaction. Your choice should align with your lawn size, target weeds, and preferred application method for ideal weed prevention results.

Duration of Control

Three primary factors determine how long your pre-emergent herbicide will effectively prevent weeds from establishing in your lawn. First, the specific active ingredient you choose makes a significant difference, with some formulations providing up to six months of protection while others offer only three months or less. Second, environmental conditions like rainfall amounts, temperature fluctuations, and your soil’s composition directly impact how quickly the herbicide breaks down after application. Third, the target weed species influences duration since different products work more effectively against specific weeds for varying timeframes. I recommend selecting longer-lasting formulations to reduce reapplication frequency, though you’ll still need regular fall and spring treatments to maintain consistent protection as effectiveness naturally diminishes over time.

Cost Per Application

Understanding how long pre-emergent herbicides last helps you plan your budget, since cost per application varies dramatically based on several key factors. I’ve found that prices typically range from $0.10 to $5.00 per 1,000 square feet, depending on the active ingredients and formulation you choose. Higher concentration products often cost less per application despite their premium price, since you’ll need smaller quantities to achieve effective coverage. Products covering up to 15,000 square feet provide excellent value compared to smaller coverage options. Don’t forget to factor in reapplication costs, especially if your region experiences heavy weed pressure or challenging climate conditions that reduce product longevity and effectiveness.

On a final note

I’ve covered eight proven pre-emergent herbicides that’ll help you maintain a weed-free lawn throughout the growing season. Whether you choose prodiamine-based products like Barricade, or combination fertilizer options from Scotts, timing your application correctly remains essential for success. Remember to apply these treatments before soil temperatures reach 55°F, and always follow label instructions for your specific grass type. With proper selection and application, you’ll prevent weeds before they become a problem.