Editorial Note:LeekGarden may receive commissions through affiliate partnerships. These commissions in no way influence the editorial integrity or professional assessments of our review team
Crabgrass can quickly turn a beautiful, lush lawn into an unsightly mess. If this pesky weed is frustrating your gardening efforts, you're not alone! This comprehensive guide to the best crabgrass killers will be your lifesaver. We'll review top-rated post-emergent products to eliminate existing crabgrass, explore pre-emergent options to prevent future infestations, and cover different forms like liquid, concentrate, and granular herbicides. Choosing the right product can be overwhelming, but this guide will simplify the process, empowering you to reclaim your lawn and achieve a healthy, vibrant landscape. Crabgrass not only looks bad, but it also competes with your desirable grass for water, nutrients, and sunlight.
A bottle Bayer Advanced weed and crabgrass killer
More...
5 Best Crabgrass Killers — Product Reviews
01. Primesource Quinclorac 1.5L Select (Drive XLR8) Liquid Crabgrass Killer
The Primesource Quinclorac 1.5l Crabgrass Killer is one of the best ways to get rid of crabgrass. After going after several different products, I used it and became a permanent fan. Out of the many different ones that I have tried, I would definitely vouch for this one. One of the best features about this product is that it is suitable for residential and nonresidential types of grass. It is also suitable for farms and golf courses.
Quinclorac is one of the most important herbicides in crabgrass killers. This drive xlr8 herbicide crabgrass killer has a good 18.92% which makes it entirely foolproof. Eventually this drive xlr8 crabgrass formula also makes it a smooth crabgrass control.
The usage of this crabgrass killer is diluted. I found that highly convenient because that saves a lot of product. However, if the crabgrass in your garden is a little harsher than usual, then you may spray the pure formula instead of with water. One of the best things about this formula is that it kills a lot of different types of regular weed as well. It is a drive weed killer. So overall, this is the perfect formula for my garden. Best of all, I could reseed just 2 weeks later.
Best For: Overall, it's the best post-emergent liquid crabgrass killer, offering broad-spectrum control and quick results.
02. Syngenta Tenacity Turf Herbicide Tenacity Crabgrass Control
The Syngenta Tenacity Turf Herbicide is another great crabgrass killer that I tried. The tenacity weed control was an amazing choice and if it weren’t for the former, I would think this is the best. However, this grass is simply the best for Turf Grass. There is a 40% mesotroine in this formula which makes it perfect for the tenacity lawn.
The best thing I thought was that the tenacity crabgrass killer helps in targeting the regular weeds as well. No matter how far apart the weed is spread, it will remove it entirely.
The Syngenta turf grass herbicide is the ultimate option for your house. Diluted formula is used for the perfect results. In fact you only need to add 1 part of tenacity grass killer in about a gallon of water. Of course, I recommend you make it stronger if you think the ratio is not working for you. One of the best things is that it does not damage the right turf.
Best For: Targeting crabgrass and other weeds in established turfgrass, providing selective control without harming desirable grasses.
03. Bio Advanced All In One Weed And Feed
One of the most reasonable and amazing crabgrass killers that I came across is the BioAdvanced Weed and feed Crabgrass killer. This all in one weed and feed is under the budget and is effective. One of the best things about the BioAdvance weed and feed is that it does not compromise on quality. It might be light on the pocket, but it works very well.
There are several different kinds of tough weeds that are killable with this simply formula. The BioAdvanced all in one weed and feed gives power to the soil. It helps in upping the intake of nutrients from the soil to make the plants healthier.
Another great feature of bio Advance weed and feed I found in this weed and feed bioadvanced all in one crabgrass killer is that it is usable in the spring time or even in the early fall. It works several different times of the year. Another amazing feature is that it is resistant to heat and drought.
This feature makes it super convenient to use. If you are still unsure of the efficiency then maybe the number will convince you like they convinced me. 24 lbs. of the BioAdvanced all in one treats about 10,000 square feet.
Best For: Providing both weed control and fertilization in a single application, ideal for overall lawn health
04. Compare N Save Concentrate Grass And Weed Killer
If you are ready to give everything that you have to get rid of crabgrass and other weeds in your garden, then you will love this product. The compare-n-save concentrate grass and weed killer is an upgraded product which is pricy but worth every penny. The compare n save weed killer comes in several different sizes. You can choose how much you want. It is a strong solution that shows results in up to two to four days.
The reason that I found was that this compare and save grass and weed killer has up to 41% glyphosate. It is quite the strong fluid but I found it worth my money.
One proves is that one gallon can cover up to 25,000 square feet. And another very convenient feature that I found was that this spray is a ready to use spray. You do not have to run around with many more chemicals. Just one can and you are good to go. The compare and save weed killer is perfect to make your grass rainproof in about 2 hours. What more could I ask for?
Best for: Quickly eliminating existing crabgrass and other weeds, offering fast results but requiring potential reapplication.
05. Scotts Halts Crabgrass & Grassy Weed Preventer
While reviewing a few of the most amazing crabgrass killers in the market, I came across Scott’s halts crabgrass & grassy weed preventer. I mean it was not unheard of, but it was surely not something I considered to have in the list for the best. This crabgrass and grassy weed preventer is one of the best in the market for all and most seasons. It is versatile and it halts pre-emergent crabgrass. Scotts halts crabgrass and grassy weed preventer, 5,000-square feet pack is more than enough.
Regardless of what the weather is; cold, rain, heat, this product will not stop working. Scotts Crabgrass & Grassy weed preventer can be used in the spring to prevent crabgrass and weed all over the season. If you apply it in fall, you can simply prevent your space from moss and halts pre emergent. One of the most unbelievable things is that I could see visible results in just one application.
Best For: Preventing crabgrass germination throughout the year, offering long-lasting control with a single application.
What is Crabgrass?
Crabgrass are irritating annual weeds that can quickly take over a lawn. They are easily identifiable by their low-growing, spreading habit, with stems that radiate outwards from a central point, resembling the legs of a crab. The leaves are typically wider than those of desirable turfgrasses and often have a lighter green or blue-green color.
Crabgrass thrives in warm conditions and follows a specific life cycle:
- Germination: Seeds germinate in the spring when soil temperatures consistently reach 55-60°F (13-16°C).
- Growth: Plants grow rapidly throughout the summer, forming dense clumps.
- Flowering & Seed Production: Crabgrass produces numerous seeds in late summer and early fall.
- Death: The plants die with the first frost, leaving behind seeds that will germinate the following spring.
Understanding this cycle is crucial for effective crabgrass control. Crabgrass identification is the first step.
For detailed images and descriptions to help with crabgrass identification, visit these resources:
Purdue University - Identifying Common Lawn Weeds: https://www.purduelandscapereport.org/article/identifying-common-lawn-weeds/
NC State Extension - Crabgrass: https://content.ces.ncsu.edu/crabgrass
Watch this to learn more about crabgrass:
Youtube.com
Read more: Best Weeder Tool 2019: Beginners Guide & TOP 5 Reviews
When to Apply Crabgrass Preventer?
The timing of your application is critical for success. There are two main types of herbicides to consider:
- Pre-emergent herbicides: These are applied before crabgrass seeds germinate. They create a chemical barrier in the soil that prevents seedlings from emerging. The key is to apply them in early spring, before soil temperatures consistently reach 55°F (13°C) for several consecutive days. This is crucial for pre-emergent application and crabgrass preventer timing.
- Post-emergent herbicides: These are used to kill crabgrass that has already emerged. They are most effective when applied to young, actively growing plants.
To track soil temperatures in your area and determine the optimal timing for pre-emergent application, you can use tools like:
- GDDTracker: https://www.gddtracker.net/
- GreenCast Online (Syngenta): https://www.greencastonline.com/
- Your local extension service: Many university extension websites provide local soil temperature data and recommendations.
What Factors to Consider?
When choosing the best crabgrass killer, consider these factors:
1. Coverage
Calculate the square footage of your lawn (length x width) to determine how much product you need. Note that coverage varies depending on the product's concentration and whether it's a liquid crabgrass killer, granular crabgrass killer, or concentrate crabgrass killer.
2. After affects
- Selective herbicides: Target specific weeds (like crabgrass) without harming desirable grasses. This is ideal for lawns.
- Non-selective herbicides: Kill all vegetation they come into contact with. Use these with extreme caution, primarily for spot treatments or areas where you want to eliminate all plant life.
3. Environment/Area
Climate significantly impacts crabgrass growth and herbicide effectiveness. In warmer climates, crabgrass may have a longer growing season, requiring multiple applications.
4. Convenience
- Ready-to-use liquids: Convenient for small areas or spot treatments.
- Concentrated liquids: Require mixing with water but are often more economical for larger areas.
- Granular products: Applied with a spreader and may also contain fertilizer ("weed and feed").
5. Cold vs. warm Temperature
Crabgrass germination and growth are directly tied to soil temperature. Warm temperatures accelerate growth, while cold temperatures inhibit it. Herbicides are most effective when weeds are actively growing
6. Comparing Organic and Inorganic
- Organic: Often derived from corn gluten meal, these prevent seed germination. They are a safer option for the environment and pets but may require more frequent applications. Organic crabgrass killer is a good preventative measure.
- Inorganic: These are synthetic herbicides containing chemicals like glyphosate, quinclorac, 2,4-D, and MSMA. They can be very effective but may pose risks to humans, pets, and the environment if not used carefully. Always follow label instructions. For more in-depth information about active ingredients in herbicides, see the EPA's and NPIC resource page
7. Liquid vs. Granular
- Liquid: Offers quick absorption and is ideal for spot treatments.
- Granular: Provides broader coverage and may include fertilizer for added lawn benefits.
8. Price
Prices vary widely. Here's a general guideline:
- Under $20: You can find basic pre- and post-emergent herbicides, often in smaller sizes or less concentrated formulas.
- $20 - $50: This range offers a wider selection of both pre- and post-emergent herbicides, including some with higher concentrations or added features like fertilizer.
- Over $50: These are typically professional-grade products, larger sizes, or specialized formulas for specific needs.
9. Regulations/Restrictions
Before purchasing, check local regulations as some herbicides, like MSMA, may have restrictions or be banned in your area. This is important for both legal compliance and environmental protection.
What Are The Advantages And Disadvantages of Crabgrass Killers?
Crabgrass killers are an amazing way to keep your lawn clean. However, it does have several different cons as well. Check them both out. You can also checkout these five facts about crabgrass killers.
Pros:
- Quick and effective at eliminating crabgrass
- Can improve the overall health and appearance of your lawn.
- Some products offer long-lasting control, especially pre-emergent herbicides.
Cons:
- Crabgrass killer safety is a concern. Fumes can be harmful to humans and animals.
- Some herbicides can persist in the soil, potentially affecting desirable plants.
- They can add to the cost of lawn care.
Crabgrass killer - Affecting Health?
Crabgrass killers, particularly those containing synthetic chemicals, can pose health risks. Inhalation of fumes can cause respiratory problems, skin irritation, and eye irritation. Accidental ingestion can be very dangerous. Always wear protective gear (gloves, mask, eye protection) when handling these products. Keep children and pets away from treated areas until the product has dried completely and follow all label instructions carefully. Consider linking to resources like the EPA or local extension offices for more information on herbicide safety.
What’s the best way to use crabgrass killer? (How to apply crabgrass killer)
A few tricks to keep in mind when you use crabgrass killer are the following;
- Timing is key: Monitor weather patterns and soil temperature.
- Measure soil temperature: Use a soil thermometer for accuracy.
- New lawns: Wait until after at least three mowings before applying herbicides.
- Even application: Ensure complete coverage to avoid missed spots.
- Follow instructions: Carefully read and follow the product label for mixing ratios (if applicable) and application methods.
The Systemic and Contact Herbicide
Systematic Herbicide:
- Mechanism: These herbicides are absorbed by the plant and translocated throughout its system, including the roots. This leads to a slower but more complete kill.
- Pros: Effective for killing the entire plant, including the roots, preventing regrowth.
- Cons: Takes longer to see results.
Contact Herbicide:
- Mechanism: These herbicides kill only the parts of the plant they come into direct contact with.
- Pros: Works quickly, often showing visible results within hours or days.
- Cons: May not kill the roots, leading to potential regrowth
Pre-Emergent vs. Post-Emergent Herbicides
Mostly, crabgrass killers are herbicides, and you could find plenty of it, with different brands and effects, in the market.
The emergent herbicides include the pre as well as post-emergent herbicides. The first one is effective in blocking a particular grass’ enzyme during its seed germination.
This is why pre-emergent herbicides block the weed or grass from multiplying or growing. It’s advisable to use when the temperature is high such as during summer.
Crabgrasses in the garden
Meanwhile, the post-emergent herbicide is being used only after the crab grasses have flourished or grown in your garden. It’s applied when there are still weeds left in your garden after you’ve used the pre-emergent herbicide.
If you want longer or efficient effect, you can use this throughout the season since it could not be that effective when dealing with established or very thick crab grasses.
Non Selective and Selective Herbicides
Are these good options? Well, if you’re a gardener that would only want to eliminate a particular type of weeds around your beloved flower, the selective herbicide would be one best crabgrass killer to have. As its name connotes, it’s excellent in eliminating a particular type of plants only.
But if you need the type of herbicide that would execute various kinds of plants, then having the non- selective herbicide will work great for you. But on some point, this could cause some risks on some useful plants in your garden.
This herbicide is an excellent option if you’re just about to start your garden. But if it’s already established, then having the selective herbicide is better.
Watch this video to learn more about how to eliminate crabgrass in your lawn:
Youtube.com
Safety Measures and Warnings
A man spraying herbicides
When using chemical herbicides, you need to be extra careful. That’s why you should be aware of some safety measures. This way, you would minimize the injuries or specific hazards to your children and other family members. Below are safety measures to observe when dealing with the best crabgrass killer.
❝
Don't waste money on the wrong weed sprayer! Our 2025 buyer's guide reveals the top picks and helps you choose the best one for your needs.
Best Weed Sprayer In 2025: Buyer’s Guide and Review
- Some herbicides can damage furniture, concrete, or wood.
- Avoid spraying near fruit-bearing plants, trees, or flowers unless the product is specifically labeled as safe for such use.
- Always read and understand the application instructions on the herbicide label.
- Use the herbicide only on the intended target areas.
- First Aid: If herbicide gets on skin, wash thoroughly with soap and water. If it gets in eyes, flush with plenty of water for 15 minutes. If ingested, do not induce vomiting; seek immediate medical attention.
- Storage: Store herbicides in their original containers, out of reach of children and pets, and away from extreme temperatures.
There are several best crabgrass killer to choose from. You just need to be wise in deciding what suits you best. Hope that the above information would greatly help you.
Our top five options are considered among the effective products, which you can also try. Read on these crabgrass killer reviews to learn more.
Conclusion
After reading this article, you might have a better idea of everything about the best crabgrass killer. There are several in the market and I personally reviewed them to find the one that is best for different categories. You can read detailed reviews in this article.
For me the top is always going to be the Primesource Quinclorac Liquid Crabgrass Killer. It is high in concentration to the extent that it dilutes in water. This feature is something very important in this kind of herbicide. Another reason why I found this amazing is that it is quitter versatile. It works on all kinds of lawns including residential.
Primesource Quinclorac 1.5L Select (Drive XLR8) Liquid Crabgrass Killer
Makes it the best for almost everybody! One reason I definitely go after this is that there are no additional ingredients required to spray this. All you need is water and you are good to go. And finally, the ultimate reason why this one is the best is because it gives quite some coverage!
Now that you know all the essentials, it is time to pick out the best crabgrass killer for your lawn. Good luck!
Faq
What kills crabgrass permanently?
What will kill crabgrass but not the lawn?
Products reviewed from the image source: https://www.amazon.com/
Disclaimer: This article provides general information about crabgrass killers and related topics. The external links provided are for informational purposes only and do not constitute an endorsement of any specific product or service. Always read and follow product label instructions carefully. LeekGarden is not responsible for the content of external websites
