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Weed Killer For Lawns
From herbicides targeting broadleaf weeds to selective formulas that preserve your desired grass species, our range offers effective solutions for maintaining a weed-free landscape, allowing you to enjoy a lush and healthy yard.
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SpeedZone Weed Killer
Fast-acting liquid weed control designed to kill tough broadleaf weeds
SpeedZone Weed Killer
Fast-acting liquid weed control designed to kill tough broadleaf weeds
Regular price $56.95Regular priceUnit price / perSale price $56.95 -
Q4 Plus Weed Control
All-in-one weed killer for crabgrass, yellow nutsedge, and broadleaf weeds in lawns.
SaleQ4 Plus Weed Control
All-in-one weed killer for crabgrass, yellow nutsedge, and broadleaf weeds in lawns.
Regular price From $56.95Regular priceUnit price / per$59.99Sale price From $56.95Sale -
T-Zone SE Weed Killer
Post-emergent control for tough broadleaf weeds in lawns
T-Zone SE Weed Killer
Post-emergent control for tough broadleaf weeds in lawns
Regular price $44.99Regular priceUnit price / perSale price $44.99 -
Sedgehammer Plus Weed Control
Targeted Post-Emergent Control for Yellow and Purple Nutsedge.
SaleSedgehammer Plus Weed Control
Targeted Post-Emergent Control for Yellow and Purple Nutsedge.
Regular price $18.90Regular priceUnit price / per$19.99Sale price $18.90Sale -
Celsius WG Herbicide
Broad spectrum weed control for warm season lawns
Celsius WG Herbicide
Broad spectrum weed control for warm season lawns
Regular price From $19.95Regular priceUnit price / perSale price From $19.95 -
Atrazine St. Augustine Weed Killer
Controls weeds in St. Augustine & Centipede lawns without harming turf
Atrazine St. Augustine Weed Killer
Controls weeds in St. Augustine & Centipede lawns without harming turf
Regular price $21.95Regular priceUnit price / perSale price $21.95 -
Triad Select Selective Herbicide – 3-Way Broadleaf Control
Professional 3-Way Broadleaf Weed Control for Cool Season Lawns
Triad Select Selective Herbicide – 3-Way Broadleaf Control
Professional 3-Way Broadleaf Weed Control for Cool Season Lawns
Regular price From $39.95Regular priceUnit price / perSale price From $39.95 -
LESCO Three-Way Selective Spot Weeder with Foaming Action
Ready-to-use foaming spray for quick spot treatment of broadleaf weeds in lawns.
LESCO Three-Way Selective Spot Weeder with Foaming Action
Ready-to-use foaming spray for quick spot treatment of broadleaf weeds in lawns.
Regular price $26.95Regular priceUnit price / perSale price $26.95 -
Drexel De-Amine 4 Herbicide
Economical 2,4-D solution for controlling common broadleaf weeds in established turf.
Drexel De-Amine 4 Herbicide
Economical 2,4-D solution for controlling common broadleaf weeds in established turf.
Regular price $24.95Regular priceUnit price / perSale price $24.95 -
Vexis Herbicide Granular
Controls nutsedge without spraying
Vexis Herbicide Granular
Controls nutsedge without spraying
Regular price From $42.95Regular priceUnit price / perSale price From $42.95 -
Spreader Sticker Spray Booster Surfactant
Improves spray coverage and herbicide performance
Spreader Sticker Spray Booster Surfactant
Improves spray coverage and herbicide performance
Regular price From $17.95Regular priceUnit price / perSale price From $17.95 -
Granular Broadleaf Weed Killer
Granular weed killer for dandelions, clover, and broadleaf weeds
Granular Broadleaf Weed Killer
Granular weed killer for dandelions, clover, and broadleaf weeds
Regular price $49.99Regular priceUnit price / perSale price $49.99 -
Certainty Herbicide (Selective Warm-Season Turf Herbicide)
Professional-grade control of nutsedge, Poa annua, and invasive cool-season grasses in warm-season lawns.
Certainty Herbicide (Selective Warm-Season Turf Herbicide)
Professional-grade control of nutsedge, Poa annua, and invasive cool-season grasses in warm-season lawns.
Regular price $139.99Regular priceUnit price / perSale price $139.99 -
Celsius XTRA Herbicide – Broadleaf & Sedge Control for Warm-Season Turf
All-in-One Postemergent Weed Control for Warm-Season Lawns
Celsius XTRA Herbicide – Broadleaf & Sedge Control for Warm-Season Turf
All-in-One Postemergent Weed Control for Warm-Season Lawns
Regular price $186.99Regular priceUnit price / perSale price $186.99 -
Quintessential Weed Killer
Kills crabgrass fast!
Quintessential Weed Killer
Kills crabgrass fast!
Regular price $74.99Regular priceUnit price / perSale price $74.99 -
LESCO Prosecutor Pro Non-Selective Herbicide
Total vegetation control with no soil residual.
LESCO Prosecutor Pro Non-Selective Herbicide
Total vegetation control with no soil residual.
Regular price $107.63Regular priceUnit price / perSale price $107.63 -
LESCO Three-Way Broadleaf Liquid Weed Control
Controls dandelions, clover, and broadleaf weeds in lawns
LESCO Three-Way Broadleaf Liquid Weed Control
Controls dandelions, clover, and broadleaf weeds in lawns
Regular price From $94.99Regular priceUnit price / perSale price From $94.99 -
Ornamec 170 Grass Herbicide – Selective Bermudagrass Control
Selective grass killer for removing Bermudagrass from fescue, zoysia, and landscape beds.
Ornamec 170 Grass Herbicide – Selective Bermudagrass Control
Selective grass killer for removing Bermudagrass from fescue, zoysia, and landscape beds.
Regular price $49.94Regular priceUnit price / perSale price $49.94 -
Fusilade II Turf & Ornamental Herbicide – Selective Grass Weed Control
Best for removing Bermudagrass and grassy weeds from fescue, zoysia, and ornamental beds.
Fusilade II Turf & Ornamental Herbicide – Selective Grass Weed Control
Best for removing Bermudagrass and grassy weeds from fescue, zoysia, and ornamental beds.
Regular price $93.78Regular priceUnit price / perSale price $93.78 -
Lesco Triclopyr 4 Ester
Enhanced bermuda grass suppression in tall fescue lawns
Lesco Triclopyr 4 Ester
Enhanced bermuda grass suppression in tall fescue lawns
Regular price $62.99Regular priceUnit price / perSale price $62.99 -
Roundup QuikPRO
Non-selective fast-acting herbicide
Roundup QuikPRO
Non-selective fast-acting herbicide
Regular price $28.99Regular priceUnit price / perSale price $28.99 -
Methylated Seed Oil
Spray adjuvant that improves herbicide absorption and effectiveness
Methylated Seed Oil
Spray adjuvant that improves herbicide absorption and effectiveness
Regular price $26.95Regular priceUnit price / perSale price $26.95 -
QuickSilver Weed Killer
Fast-acting broadleaf weed control with visible results in hours
Sold outQuickSilver Weed Killer
Fast-acting broadleaf weed control with visible results in hours
Regular price $212.39Regular priceUnit price / perSale price $212.39Sold out -
Tribute Total Weed Control
Broad spectrum weed control for bermuda and zoysia lawns
Sold outTribute Total Weed Control
Broad spectrum weed control for bermuda and zoysia lawns
Regular price $475.95Regular priceUnit price / perSale price $475.95Sold out
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How It Works
Choose Your Lawn
Tell us your lawn type and goals.
Get Your Program
We recommend the right products and timing.
Apply With Confidence
Simple steps for a thicker, greener lawn.
Choose Your Lawn
Tell us your lawn type and goals.
Get Your Program
We recommend the right products and timing.
Apply With Confidence
Simple steps for a thicker, greener lawn.
Maintaining a lush, green lawn can be challenging, especially when weeds start to invade. Finding the right weed killer for lawns is essential to keep your grass healthy and beautiful. Below, we'll explore the best products and practices for effective lawn weed control.
Understanding Lawn Weeds
Weeds will germinate almost anywhere they can which is why they can become an issue. It is important to apply a pre-emergent before weeds germinate which greatly reduces chasing weeds in your lawn
Common Lawn Weeds
Different types of weeds can plague your lawn, each requiring a specific approach for control. Common lawn weeds include dandelions, crabgrass, and clover are easy to control and usually only require one to two applications of herbicide.
Why Weeds Are a Problem
Weeds compete with grass for nutrients, water, and sunlight, which can result in weak and patchy lawns. Addressing weeds promptly is crucial for maintaining a vibrant lawn. It is also necessary to perform a soil test at least once per year to make sure your soil is within range for growing grass. When soils become out of range, weeds can quickly invade your lawn.
Choosing the Best Weed Killer for Lawns
It depends on lawn type and target weed. There is not a perfect weed killer for your lawn. Most weed killer products will control a number of weeds in the lawn.
Weed Killer Safe for Lawns
When selecting a weed killer, it's important to choose a product that is safe for your lawn. Look for weed killers that target weeds without harming your grass. Always check the label and follow instructions precisely. Most organic options are not effective controlling weeds.
Best Lawn Weed Killer for Spring
Spring is an ideal time for lawn weed treatment as weeds are actively growing. We suggest applying a blanket application (spraying the entire lawn area) with weed killer on the first and second application of pre-emergent fertilizer. By applying both herbicides twice, any existing weeds will be killed off and a prevention barrier will protect against future weeds.
Pre-Emergent vs. Post-Emergent Weed Killers
Understanding the difference between pre-emergent and post-emergent weed killers can help you choose the right product for your lawn. Pre-emergent treatments prevent weed seeds from germinating, while post-emergent treatments kill existing weeds. Note: pre-emergent treatments must be applied before seed germination. Be sure to check soil temperature and apply early.
How to Apply Weed Killer in Grass
Proper application of weed killer is crucial for effectiveness. Before applying any products to your lawn, start by calibrating your sprayer with water. It is important to know how much liquid will be applied per 1,000 sqft to properly mix weed killer.
Once calibrated and mixed, using a pump sprayer or battery operated sprayer, start by painting the lawn from front to back, making sure only to apply on the lawn. For spot spray applications, lightly spot spray the target weed, do not water in the weed with herbicide.
Tips for Successful Lawn Weed Treatment
It is not just a one and done. There are many tips and tricks to minimize weeds in your lawn. However, the most important tip is consistency with every fertilizer and weed preventative treatment.
Regular Lawn Maintenance
Consistent lawn care practices, such as mowing, watering, and fertilizing, can help prevent weed infestations. Lawn care is ongoing maintenance and should not be neglected.
Benefits of Using a Surfactant with Weed Killer
Surfactants help the herbicide to spread more evenly across the weed's surface, ensuring better coverage and penetration. This leads to more effective weed control.
By reducing the surface tension of the liquid herbicide, surfactants allow for better absorption of the chemical into the weed, which enhances its ability to kill the weed from the inside out.
Combining Treatments for Best Results
Using a combination of treatments, such as manual weeding, herbicides, and proper lawn care, can enhance the effectiveness of your weed control efforts. Before mixing or combining any herbicides, check to make sure the label permits combining herbicides or damage to your lawn may occur.
Finding the right weed killer for lawns is key to achieving a healthy, weed-free lawn. By understanding the types of weeds, choosing the appropriate products, and following best practices for application and maintenance, you can enjoy a beautiful, lush lawn year-round. Explore our recommended products and tips to keep your lawn looking its best.
For added convenience, below is a detailed chart that matches each type of weed, such as broadleaf and grassy weeds, with the most appropriate weed killer. This easy-to-use guide helps you choose the perfect lawn treatment for weeds, ensuring a lush, healthy lawn all year round.

Shop now and find the perfect weed killer for your lawn at lawnsynergy.com, where lawn care is made simple and effective.
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Got Questions?
Frequently Asked.
What is the best weed killer for lawns?
It depends on your lawn type and the target weed you are after.
- Tall Fescue Grass: Triad Select & Q4 Plus
- Bermuda Grass: Celsius WG & Q4 Plus
- Zoysia Grass: Celsius WG & Q4 Plus
- Kentucky Bluegrass: Triad Select
- Ryegrass: Triad Select
- Centipede Grass: Celsius WG
- St. Augustine Grass: Celsius WG
Which is More Effective for Weed Control: Granular or Liquid Weed Killer?
Liquid weed killer is more effective and preferable for lawns compared to granular forms. It offers better and more uniform coverage, ensuring that the herbicide is evenly distributed across the lawn. This results in a more efficient and thorough weed control. Additionally, liquid formulas tend to be absorbed more quickly and effectively by weeds, leading to faster and more reliable results.
When should I apply weed killer to my lawn?
The best time to apply weed killer to your lawn largely depends on the presence of the target weeds. Essentially, any time is a suitable time to apply weed killer if the weeds you want to control are actively growing. However, for optimal results, it's recommended to apply weed control treatments in the morning. During this time, temperatures are typically cooler, which can enhance the effectiveness of the herbicide. Cooler temperatures help in reducing the risk of evaporation and can aid in better absorption by the weeds. It’s also important to check the weather forecast and avoid application before rain, which can wash away the herbicide. Following these guidelines ensures that the weed killer works effectively, targeting the weeds without causing undue stress to your lawn.
Is it better to spray weeds before or after mowing?
It is generally better to spray weeds after mowing your lawn. Mowing first helps in multiple ways. It trims the grass and weeds, making the latter more exposed and vulnerable to the weed killer. This ensures that the herbicide is directly applied to the weed, increasing its effectiveness. Additionally, mowing can help in evenly distributing the weed killer across the lawn. By waiting a couple of days after mowing, you allow the weeds to begin recovering and growing actively, which makes them absorb the herbicide more efficiently. This method enhances the overall effectiveness of the weed control process, ensuring that the weeds are targeted more precisely and effectively.
What to do if lawn is all weeds?
It depends on the severity of the weed infestation in your lawn. If the area is comprised of 60% or more weeds, the most effective strategy is often to start over from scratch. This process involves using a non-selective herbicide to kill off all vegetation in the area. Non-selective herbicides are broad-spectrum and will eliminate both the weeds and any grass present, so it's a measure reserved for severe cases. After applying the herbicide and giving it sufficient time to work, the next step is to till the soil. Tilling helps to remove any remaining weed roots and prepares the soil for new grass. Once the area is cleared and the soil is ready, you can then proceed to install a new lawn. This approach ensures that you're starting with a clean slate, free from weeds, which gives your new lawn the best chance of thriving.
