Goosegrass is one of the most stubborn weeds to eliminate once it establishes in a lawn. Its clumping growth habit and resistance to many common weed killers often leave homeowners frustrated after wasting time and money on ineffective sprays.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I focus on comparing herbicide chemistry, reading turfgrass science studies, and analyzing aggregated owner feedback to match products to real-world lawn conditions.
This guide breaks down the top-performing formulas to help you select the most effective and lawn-safe best herbicide for goosegrass for your specific growing conditions.
How To Choose The Best Herbicide For Goosegrass
Goosegrass is a summer annual grass weed that thrives in compacted soil and high-traffic areas. Unlike crabgrass, it germinates later in the season and develops a tough, fibrous root system that makes it difficult to control with standard weed-and-feed products. Selecting the right herbicide requires matching the active ingredient to your turf type, the goosegrass growth stage, and your long-term lawn management goals.
Understand Active Ingredients
Not all herbicides are created equal when it comes to goosegrass. Look for active ingredients such as metsulfuron-methyl (MSM), mesotrione, sulfentrazone, and fenoxaprop. These compounds work by inhibiting specific enzymes in the weed, leading to controlled die-back without harming established turf when applied correctly.
Post-Emergent vs. Pre-Emergent Timing
Post-emergent herbicides are applied directly to visible goosegrass plants and are most effective when the weeds are young and actively growing, typically in late spring through early summer. Pre-emergent products create a chemical barrier in the soil that prevents goosegrass seeds from germinating. A two-step approach using both can provide season-long control.
Turf Compatibility
Certain herbicides are safe on cool-season grasses like tall fescue and Kentucky bluegrass but can damage warm-season varieties like St. Augustine or centipede grass. Always check the product label for your specific turf type. Products containing MSM and sulfentrazone are generally well-tolerated by a wider range of established lawns.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| PBI Gordon SpeedZone EW | Broadleaf Herbicide | Fast cool-weather control | 1 Gallon Concentrate | Amazon |
| Sulfentrazone 4SC Dismiss | Sedge/Grass Herbicide | Nutsedge & goosegrass | 6 oz Concentrate | Amazon |
| Southern Ag Crossbow | Weed & Brush Killer | Large area spot treatment | 1 Gallon | Amazon |
| Liquid Harvest Mesotrione | Pre & Post Emergent | Prevention & early control | 8 oz Concentrate | Amazon |
| Hi-Yield Grass Killer | Postemergence | Bermuda grass in gardens | 8 oz Concentrate | Amazon |
| Gordon’s Trimec Plus | 3-Way Herbicide | Crabgrass & broadleaf mix | 1 Quart Concentrate | Amazon |
| Quali-Pro MSM Turf 8oz | Turf Herbicide | Residential & golf course | 8 oz Concentrate | Amazon |
In‑Depth Reviews
1. PBI Gordon SpeedZone EW Broadleaf Herbicide
SpeedZone EW is widely regarded by turf professionals for its rapid control of tough broadleaf weeds and grasses. The emulsifiable concentrate formulation absorbs quickly into plant tissue, with visible activity on goosegrass and clover often appearing within hours of application. Owner feedback consistently highlights its reliability even during cooler spring and fall temperatures when many other herbicides slow down.
It is important to note that SpeedZone is a selective herbicide designed for use on established lawns, athletic fields, and sod farms. The gallon container offers substantial coverage for large properties, making it a favorite among homeowners who treat their own turf regularly. Aggregated reviews emphasize its effectiveness on ground ivy, henbit, and wild onions in addition to goosegrass.
Shipping restrictions apply in several states due to the chemical formulation, so verifying availability before ordering is essential. For most users, a single application provides noticeable suppression, but a follow-up treatment after two weeks often ensures complete eradication of mature goosegrass clumps.
What works
- Visible results on weeds in as little as one week
- Effective in cooler weather when other herbicides fail
- Broad-spectrum control of over 200 weed species
What doesn’t
- Cannot be shipped to several states including CA and CO
- More expensive per gallon than standard 2,4-D products
2. Sulfentrazone 4SC Herbicide (Dismiss)
Sulfentrazone 4SC is a professional-grade herbicide known for its exceptional activity on sedges and certain grass weeds like goosegrass. The active ingredient inhibits chlorophyll biosynthesis, leading to rapid bleaching and die-back of target weeds within 24 to 48 hours. Market research shows it is particularly favored by superintendents and commercial applicators for its gentleness on desirable turf species.
This concentrate mixes easily with water and requires the use of a non-ionic surfactant for optimal leaf adhesion and absorption. Reviews indicate that users see results faster with Sulfentrazone compared to traditional MSM-based products, especially when treating nutsedge that has co-infested with goosegrass. The product is labeled for residential lawns, golf courses, and sod farms.
The primary trade-off is the cost per ounce, which is higher than many all-purpose lawn weed killers. However, for targeted spot treatment of tough perennial weeds, owner reports suggest the efficiency makes the investment worthwhile. Mixing weak solutions as directed is critical to avoid turf injury.
What works
- Visible results on weeds within 24-48 hours
- Very gentle on established warm-season and cool-season turf
- Excellent for controlling nutsedge alongside goosegrass
What doesn’t
- Higher cost per fluid ounce than standard weed killers
- Requires precise mixing and surfactant for best results
3. Southern Ag Crossbow Specialty Herbicide
Southern Ag Crossbow is a powerful combination of triclopyr and 2,4-D that provides aggressive control of woody plants, vines, and annual/perennial broadleaf weeds. While it is not a selective grass herbicide, it is highly effective for clearing overgrown areas where goosegrass has mixed with brush and brambles. The gallon container makes up to 96 gallons of spray solution, offering enormous coverage for the price.
Owner accounts frequently mention its success in reclaiming fence lines, ditches, and pasture edges from invasive weeds and saplings. The short half-life in soil makes it a relatively low-persistence option compared to some non-selective alternatives. It works best when applied to actively growing weeds in warm weather.
It is less suited for fine lawn applications because it can damage desirable turf grasses if over-applied. For targeted goosegrass control in a manicured lawn, one of the more selective options would be a safer choice. Crossbow shines when the task is heavy vegetation management across large properties.
What works
- Cost-effective for covering very large areas
- Kills tough woody plants and vines
- Short residual activity in the soil
What doesn’t
- Not selective enough for use on established lawns
- Strong chemical odor during application
4. Liquid Harvest Mesotrione 8oz
Liquid Harvest Mesotrione is the generic alternative to the well-known Tenacity herbicide, offering the same active ingredient at a more accessible price point. Mesotrione works both as a pre-emergent, preventing goosegrass seeds from germinating, and as a post-emergent, killing young weeds through photosynthesis inhibition. It is safe for use on most cool-season turf grasses as well as St. Augustine (sod only) and centipede grass.
The 8-ounce bottle treats a substantial area and is particularly valued by lawn care enthusiasts who follow a scheduled prevention program. It must be activated by rainfall or irrigation within 10 days of application. A non-ionic surfactant is recommended for post-emergent applications to enhance leaf coverage.
One notable and harmless side effect is a temporary whitening of the turf, which typically resolves within a few weeks. Feedback from users confirms that this generic formulation performs identically to the name brand at a lower cost, making it a top choice for budget-conscious homeowners who still demand professional results.
What works
- Excellent pre-emergent barrier for season-long control
- Safe for a wide range of cool-season turf grasses
- Affordable alternative to the name-brand counterpart
What doesn’t
- Requires a surfactant for best post-emergent results
- Can cause temporary whitening of treated turf
5. Hi-Yield Grass Killer Postemergence Herbicide
Hi-Yield Grass Killer is a selective post-emergent herbicide targeting grassy weeds in and around vegetable gardens, flower beds, trees, and shrubs. Its active ingredient, sethoxydim, is absorbed through the leaves and works by stopping growth within two days, with full death occurring over several weeks. It is a go-to product for gardeners who need to remove Bermuda grass or goosegrass without harming their ornamental plants.
The concentrate makes up to 8 gallons of spray solution, which is reasonable for targeted spot treatment in garden settings. Reviews note that it is particularly effective on Bermuda grass, which is notoriously difficult to kill selectively. Patience is required, as visible results may take three to four weeks depending on weather conditions and weed maturity.
The main limitation is the small bottle size and the need for multiple applications on dense infestations. It does not kill broadleaf weeds, so a separate product may be needed for mixed weed populations. For gardeners focused on protecting vegetables and ornamentals from grass competition, Hi-Yield offers a reliable tool at a very low entry price.
What works
- Safe to use around vegetables, shrubs, and ornamentals
- Excellent control of stubborn Bermuda grass
- Easy to mix and apply with a standard sprayer
What doesn’t
- Small bottle may require buying multiple units
- Slow to show results, taking up to 3-4 weeks
6. Gordon’s Trimec Plus Crabgrass Killer Concentrate
Gordon’s Trimec Plus is a classic three-way herbicide blend enhanced with quinclorac for improved control of grassy weeds like crabgrass, foxtail, and signalgrass. It also targets over 200 broadleaf weeds. This product is formulated for use on established lawns and offers a balanced approach for homeowners dealing with multiple weed types simultaneously.
The quart concentrate treats up to 5,000 square feet, making it a practical choice for small to medium-sized lawns. User reviews highlight its effectiveness on henbit and clover, with many reporting good results on goosegrass when applied to young plants. The addition of quinclorac makes it more effective against grassy weeds than traditional 2,4-D-only products.
Some users find that mature goosegrass requires a second application for complete control, and the product should not be used on St. Augustine or centipede lawns to avoid injury. Overall, it represents a solid mid-range option for those who want a versatile herbicide that covers both grass and broadleaf weeds.
What works
- Controls both grassy weeds and broadleaf weeds
- Good value for small to medium lawns
- Effective on henbit, clover, and crabgrass
What doesn’t
- May need multiple applications for mature goosegrass
- Not safe for St. Augustine or centipede grass lawns
7. Quali-Pro MSM Turf Herbicide 8oz
Quali-Pro MSM Turf Herbicide is a professional-grade metsulfuron-methyl formulation trusted by golf course superintendents and commercial landscapers. It provides excellent control of both broadleaf and grassy weeds, including goosegrass, on ornamental turf. The 8-ounce bottle goes a long way because the product is highly concentrated and used at very low rates per acre.
This herbicide is labeled for use on residential lawns, parks, cemeteries, golf course fairways, and sod farms. Its shelf life of up to three years makes it a stable addition to any turf management program. Reviews note that it works particularly well on wild garlic, poison ivy, and difficult broadleaf species when combined with a surfactant.
The extreme potency means that application rates must be measured very carefully to avoid turf injury. It is not recommended for use on bentgrass or certain warm-season grasses without specific label guidance. For experienced applicators or those willing to follow instructions precisely, MSM Turf is a highly cost-effective professional solution.
What works
- Trusted by golf courses for broad-spectrum weed control
- Very low use rate provides excellent value per application
- Long shelf life when stored properly
What doesn’t
- Extremely potent high risk of damage if over-applied
- Not safe for all turf types requires careful label reading
Hardware & Specs Guide
Active Ingredient Chemistry
The most effective ingredients for goosegrass control include metsulfuron-methyl (MSM), mesotrione, sulfentrazone, and fenoxaprop. These compounds target specific enzymes involved in plant growth and photosynthesis, providing selective control while preserving desirable turf grasses when applied at label rates. Brands like Quali-Pro and Liquid Harvest specialize in single-active-ingredient formulations, allowing precise mixing tailored to your lawn’s needs.
Concentrate vs. Ready-to-Use
Concentrated herbicides offer significantly better value for money and allow you to customize application rates based on infestation severity. A single 8-ounce bottle of concentrate can often make 8 gallons of spray solution, covering thousands of square feet. Ready-to-use formulas are more convenient for small spot treatments but become expensive for large-scale goosegrass invasions common in full-sun lawns.
Application Equipment
For most liquid herbicides, a pump-style garden sprayer or backpack sprayer provides the best control over droplet size and coverage. Use a fan nozzle to ensure even distribution and avoid runoff. When using products like SpeedZone EW, calibrating your sprayer to deliver the correct gallonage per 1,000 square feet is essential for consistent results and turf safety.
Surfactants & Adjuvants
Goosegrass has a waxy cuticle that can repel water-based sprays. Adding a non-ionic surfactant (NIS) helps the herbicide droplets spread and adhere to the leaf surface, improving absorption and effectiveness. Many professional-grade products like Sulfentrazone 4SC explicitly recommend an NIS for optimal performance, making it a best practice for any post-emergent application.
FAQ
What is the best active ingredient for goosegrass control?
Can I use these herbicides on St. Augustine grass?
When is the best time to apply herbicide for goosegrass?
How long does it take for goosegrass to die after spraying?
Final Thoughts: The Verdict
For most homeowners, the winner for the herbicide for goosegrass category is the PBI Gordon SpeedZone EW because it delivers fast, visible results, works well in cool weather, and controls a very broad spectrum of weeds in established lawns. If you prefer a prevention-first approach, grab the Liquid Harvest Mesotrione for its excellent pre-emergent barrier. And for budget-friendly spot treatment around gardens and flower beds, nothing beats the selective action of the Hi-Yield Grass Killer.