Maintaining a healthy, weed-free lawn requires effective post emergent weed killers designed to target crabgrass and broadleaf weeds without damaging the turf. Below is a comparison table summarizing the top 5 highly rated post emergent lawn herbicides selected from reliable brands based on their active ingredients, application ease, and spectrum of weed control.
| Product | Brand | Active Ingredient | Weed Control Spectrum | Residual Control |
|---|---|---|---|---|
| BASF Drive XLR8 Crabgrass Killer | BASF | Quinclorac | Crabgrass, foxtail, bindweed, clover, dandelion | Up to 30 days |
| Atticus Torocity Herbicide | Atticus | Mesotrione (40%) | Crabgrass, ground ivy, clover, oxalis, dandelion | Pre and post emergent control |
| Liquid Harvest Mesotrione Concentrate | Liquid Harvest | Mesotrione | 46 broadleaf species including crabgrass, clover, dandelion | Post emergent with irrigation activation |
| Syngenta Tenacity Herbicide | Syngenta | Mesotrione | 46 broadleaf and grass species including crabgrass, clover, dandelion | Pre and post emergent |
| Ortho WeedClear Lawn Weed Killer | Ortho | Multiple actives | Crabgrass, dandelion, clover, chickweed, foxtail | Single application fast acting |
BASF Drive XLR8 Crabgrass Killer Herbicide
BASF Drive XLR8 offers a water-based formulation containing quinclorac, which results in superior weed control through rapid plant uptake. It targets a broad spectrum of grassy weeds such as crabgrass, foxtail, and torpedo grass, as well as broadleaf weeds including clover, bindweed, dandelion, and horseweed. The herbicide provides up to 30 days of residual control, minimizing frequent treatments. Its rainfast nature, achieving protection within an hour, enhances treatment effectiveness even under unpredictable weather conditions. This concentrate formula ensures thorough turf coverage and prolonged weed suppression.
Atticus Torocity Selective Herbicide for Lawns
Atticus Torocity contains 40% mesotrione, a trusted active ingredient compared to the market leading brand Tenacity. This dual pre- and post-emergent herbicide offers flexible application timing, providing effective control before and after weed emergence. It covers a wide range of weeds, including crabgrass, ground ivy, clover, oxalis, and dandelion. The concentrate format allows for precise mixing tailored to lawn size. Its broad-spectrum action helps protect newly seeded and established turf areas, making it ideal for year-round lawn maintenance.
Liquid Harvest Mesotrione Concentrate Weed Killer
Liquid Harvest Mesotrione is a potent post-emergent herbicide that targets 46 common broadleaf weeds and grasses, including stubborn crabgrass, clover, and dandelion. It requires rainfall or irrigation within 10 days to activate its maximum effect, resulting in full weed death over 2-3 weeks. Compatible with Kentucky bluegrass, centipede grass, and tall fescue, it is not recommended for bentgrass or bermudagrass. This selective herbicide is ideal for lawns needing targeted treatments with lasting control.
Syngenta Tenacity Pre & Post Emergent Weed Control
Syngenta Tenacity stands out as a pre- and post-emergent liquid weed control that targets 46 species, including crabgrass, clover, dandelion, and ground ivy. Its unique formula allows applications during seeding or overseeding, supporting your turf’s regeneration while eliminating weeds. The active ingredient mesotrione, derived from a natural compound, selectively controls unwanted weeds without harming lawn grasses. This product suits those seeking versatile and effective broad-spectrum weed control.
Ortho WeedClear Lawn Weed Killer Ready-To-Spray
Ortho WeedClear Lawn Weed Killer is a fast-acting, ready-to-use spray that controls crabgrass, dandelion, clover, chickweed, and foxtail. It works down to the root for lasting weed elimination with a single application. Safe for use on lawn grasses such as Bermudagrass, Buffalograss, Kentucky Bluegrass, and Ryegrass, this product is convenient for homeowners seeking a non-concentrate quick treatment solution. Its broad-spectrum capability ensures effective lawn weed suppression.
Buying Guide for Choosing the Best Post Emergent Weed Killer for Lawns
Selecting the right post emergent weed killer depends on several important considerations to ensure optimal results while protecting your lawn’s health.
Active Ingredients and Target Weeds
Quinclorac is effective against crabgrass and some broadleaf weeds with extended residual action, while mesotrione offers broad-spectrum control of various grasses and broadleaf weeds. Check product labels for targeted weed species to match your lawn’s specific weed problems.
Turfgrass Compatibility
Different formulations suit varied turf types. For example, products with mesotrione are safe for Kentucky Bluegrass, Tall Fescue, and Centipede grass but may harm Bentgrass or Bermudagrass. Always verify compatibility to prevent turf damage.
Application Flexibility
Herbicides like Atticus Torocity and Syngenta Tenacity allow both pre- and post-emergent applications, providing flexibility in timing. Ready-to-spray products offer convenience but may lack adjustable dosing options.
Residual Control Duration
Longer residual control means less frequent treatments. BASF Drive XLR8 offers up to 30 days residual effect, helping maintain weed-free turf longer compared to some other herbicides.
Environmental and Weather Considerations
Rainfast formulas secure effectiveness even when rain occurs shortly after application. Additionally, some herbicides require irrigation activation to be effective. Read label instructions regarding rainfastness and watering needs.
Safety and Usage Restrictions
Ensure products are safe for pets and children if lawn access is frequent. Consider professional-grade herbicides for larger or commercial areas, keeping in mind usage restrictions and proper protective equipment.