How to Kill Weeds in Your Lawn in 2021

Learning how to kill weeds in your lawn in 2021 with the right herbicide, weed killer, and preventative measures are essential for many reasons. For one, your yard as a whole, all year round, is so much more beautiful without weeds. The truth is, no one really likes fuzzy, unattractive weeds in lawns. Also, your grass will have much more room to grow for a healthier, longer lifespan. Whether it’s in your driveway, garden, gravel sidewalks, or rock beds, weeds can grow anywhere.

best way to kill weed in lawn used by professionals
Treating weeds in your lawn is easy when you take an active, year-round approach.

We hope you find these quick tips on killing weed in the lawn helpful to keeping your backyard healthy and looking great. Thanks for stopping by The Weed Wizard, a leading weed control resource for anyone searching for the best weed killer and most effective herbicides for their home and garden. With our reviews and guides, you can transform your yard, garden, and flower beds into the neighborhood’s envy by killing and preventing those annoying weeds that seem to sprout everywhere.

When it comes to lawn and landscape care in 2021, we’re here to help with the best, to-the-point guides and best weed killer ratings for a healthy landscape, and in this particular case, how to kill weeds in the lawn. By tending to those ugly and backbreaking-to-pull weeds, all eyes will remain on your showstopping lawn and flower beds.

Killing weeds in your lawn and preventing them from coming back is sometimes more challenging because of the difficulty in precisely attacking them. Therefore, we have listed a handful of ways to kill the unwanted weeds from down to the roots. We believe you’ll find these solutions to killing weeds in your lawn, with our preferred weed treatments and applications, super simple and easy to follow. 

How to Kill Weeds in Your Lawn in 2021

Time needed: 30 minutes.

Killing weeds in your lawn and grass might look like a daunting task at first, but you can get rid of them permanently by following these helpful tips. Here are four simple steps to stop unwanted weeds on your lawn. 

  1. Examine Your Lawn


    The first thing to do is to examine your lawn thoroughly. Try to understand what types of weeds you are dealing with to cross-reference them with the application you choose. Make a note of how the property is mowed.  Is it too short?  Also, make a note of how dry or wet the soil is.  Too dry or too wet can affect weed growth.

    examine the weed in your lawn

  2. Choose appropriate fertilizer for your lawn.


    If you want to kill the weeds in spring before the growing season, it is recommended to get a pre-emergent formula applied in the fall or early spring. For existing weeds, however, we suggest you get a post-emergent product with fertilizer. There are also great spot treatment weed killers with triggers for convenience.

    Next Read: Roundup for Lawns, Tenacity Herbicide, & Best Weed Killers for Lawn

    weed killer for lawn choices

  3. Mow your yard at a higher level.


    Mowing at the highest level will encourage a dense, lush lawn capable of crowding out the weeds.

    mow lawn at highest level

  4. Aerate your yard annually.


    Aerating once each year in the fall will allow roots to grow deeply and produce a stronger, more vigorous lawn.

    aerate your yard

  5. Dethatch your yard when necessary.


    Dethatching will improve water and nutrient uptake. It is necessary to dethatch when thatch has become so dense that it prevents water and nutrients from penetrating the soil.

    dethatch your yard

  6. Topdress your yard if neeeded.


    Topdressing is a simple matter of spreading a light layer of organic and well-decomposed compost onto the lawn and raking it in.

    topdress your yard

  7. Reseed your yard in problem areas.


    Reseed bare patches of lawn in the fall, well before frost. Reseeding will give the grass seed a head start for spring, so the patches fill in with grass and aren’t left open to weed seeds.

    reseed your yard

  8. Adjust your irrigation.


    If your lawn is too dry or too wet for your climate, consider adjusting your irrigation system to ensure your fertilizer is getting the appropriate water to enable your grass to grow and inhibit weeds.

    water your yard


Top WIFI Irrigation Controllers for Your Sprinkler System

Below are a handful of wifi-enabled irrigation control panels that’ll allow you to manage your irrigation from your phone.

Bestseller No. 1
Orbit 21004 B-hyve Smart Hose Faucet Timer with...
Orbit 21004 B-hyve Smart Hose Faucet Timer with...
ORBIT IRRIGATION 21004 Orbit watering Smart hose faucet sprinkler timer
$56.45
SaleBestseller No. 3
Rachio 3 Smart Sprinkler Controller, 8 Zone 3rd...
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Save money and water! See up to 30-50% savings on your monthly water bill!
$173.99
SaleBestseller No. 4
Orbit B-hyve 4-Zone Smart Indoor Sprinkler...
Orbit B-hyve 4-Zone Smart Indoor Sprinkler...
FREE APP: Easy programming from the B-hyve App in both Adroid and iOS platforms; BLUETOOTH: Fast and easy pairing using Bluetooth or Wi-Fi Technology
$51.49

Last update on 2021-05-12 / Affiliate links / Images from Amazon Product Advertising API

We’re an affiliate. We hope you love the products we recommend! Just so you know, we may collect a share of sales or other compensation from the links on this page. Thank you for using our links. We appreciate it!


Top Weed Killer Treatments for Your Lawn

If you want to kill the weeds in spring before the growing season, it is recommended to get a pre-emergent formula applied in the fall or early spring. For existing weeds, however, we suggest you get a post-emergent product with fertilizer. There are also great spot treatment weed killers with triggers for convenience.

Below are a handful of popular weed killers for your lawn.

SaleBestseller No. 1
Ortho WeedClear Lawn Weed Killer Ready to Spray -...
Ortho WeedClear Lawn Weed Killer Ready to Spray -...
Fast-acting, with results in one application; Kills weeds to the roots but won't harm the lawn (when used as directed)
$10.99
SaleBestseller No. 3
Scotts Turf Builder Weed and Feed 3, 5,000 Sq. Ft.
Scotts Turf Builder Weed and Feed 3, 5,000 Sq. Ft.
Up to 2X more powerful dandelion and clover control (vs. previous formula); Clears out dandelions and clover—satisfaction guaranteed
$18.99

Last update on 2021-05-12 / Affiliate links / Images from Amazon Product Advertising API

Weed Killer Warning! Always read the manufacturer’s recommendations when choosing and applying any chemical herbicides to your lawn or landscape beds. Wear protective gloves and remember that some weed killer applications can kill flowers, grasses, and shrubs.


FAQs and Considerations for How to Kill Weeds in Lawn

kill weed in lawn for year round health
Keeping weeds out will make your yard look great and healthy.
Does climate matter?

Yes, the climate you live in does matter when treating weeds in your lawn. If you live in a warmer climate, your approach to weeds will be much the same year-round. You’ll need an active approach verse a passive one and may want to consider a herbicide or preventative granule. In colder climates, you’ll want to consider an application in the fall that includes a weed killer with fertilizer. Taking this preventative measure in the fall to kill weeds in the winter and enrich the soil for the spring is an excellent option for year-long control.

How do you get rid of weeds without killing the grass?

Since you are killing weeds on your lawn, you’ll want to choose a selective weed killer so it won’t harm the grass. If you’re killing weeds in a gravel area, on the other hand, a non-selective treatment will work best. Roundup for Lawns and Tenacity are highly recommended selective weed killers for lawns.

What is the best way to get rid of weeds in your lawn permanently?

If you are looking for a long-lasting solution to kill weeds permanently, you’ll want to initially consider what encourages weeds to grow in the first place?  The common causes of weed issues include compacted or water-deprived soil and low-mowed grass. Thus, it is important to maintain a healthy lawn environment for appearance and the health of the lawn. While there isn’t necessarily a permanent solution to killing weeds in your yard, you can get very close to managing them all year long by taking an active approach.

What is a pre-emergent weed killers for your lawn?

A pre-emergent weed killer is used by homeowners in their lawns to stop the weed germination process before it begins. When you use this type of weed killer, it interrupts the process by which weeds sprout through the soil. This process prevents the seeds from growing and becoming a small plant. You should consider using a pre-emergent weed killer on the entire garden area.

How do you treat a large lawn?

The treatment area’s size will help you determine the best approach to take when killing weeds in your lawn. If it’s a large area, utilizing a granular weed-and-feed might be the best approach. If it’s a small area, of course, a weed killer with a trigger usually does the trick.

What is a post-emergent weed killer for gardens?

A post-emergent herbicide kills weeds that have already popped out of the ground as opposed to a pre-emergent that kills them before they sprout. Weeds start to germinate after soil temperature reaches about 55 degrees and that means a post-emergent product is best used from spring through fall.

What are topical herbicides and weed killers for gardens?

Topical herbicides, also known as contact herbicides kill only that part of the weed that the herbicide touches, the part above the ground. They work best on small, annual weeds.

What are systemic herbicides and weed killers for gardens?

Systemic herbicides pass through the plant and control weeds by taking the entire plant out, roots and all. They’re effective on perennial weeds. While some topical post-emergents may show ground-level results within hours, systemic products kill the whole plant.

What are residual weed killers?

With weed resistance on the rise just about everywhere, including around patios and pavers, residual herbicide usage increases importance. Using residual herbicides with several Modes of Action (MOAs) can increase the probability of acceptable weed control by giving the crop a longer time to emerge and reducing resistance pressure on post-emergence herbicides. Residual herbicides can be especially important in fields that already have herbicide-resistant weeds. These residual herbicides are selective, meaning they control certain weed species while leaving the crop grown unharmed. They should be applied before weeds emerge. 

What should you look for in a weed killer for gardens?

1. Effectiveness: You can check the product’s effectiveness by looking at the chemicals used in it. After that, consider the reviews of the users who have purchased the product.

2. Water resistance: The weed killer you intend to buy for your garden should be water-resistant during the rainy season. Several weed killers in the market guarantee water resistance for a certain amount of time following application and during the rainy season.

3. Type: There are two types of weed killers in the market, one is a concentrate, and the other is ready to use. When we talk about the concentrates, they are comparatively expensive but can be potent in their performance based on how you dilute them. If you buy a concentrated weed killer, you have to experiment with it with different concentrations to find the perfect amount for your needs.

4. Safety: When you shop for the best weed killer for your lawn management at home, always consider your pets and kids’ safety. You must check the ingredients used in making that product and find the answers to several questions that come to your mind, such as whether or not the weed killer is organic. Are there any chemicals that might harm your children over time?

5. Ease of use: The weed killer you are planning to buy for your lawn should be pretty easy to use. You will notice that most of the weed killers come with complicated instructions, and you need to follow the steps for their preparation and application. It would help if you considered buying a product that is easy to prepare, and everyone quickly understands the instructions.

6. Application coverage: For small areas that need weed treatment, the ready-to-use products are the best choice. When there are incredibly tough weeds or you need to cover a large space, concentrated products will be your best bet.

7. Seasonality: Considering the weather is very important when you will buy a weed killer for your garden or lawn. Some weed killers in the market work for a specific season, and you cannot use them throughout the year. If you buy a weed killer to get rid of weeds in the winter season, it may not be useful during the summer season. Read the label carefully to give you an idea about the season in which the products should be used. Many weed killers, however, can be used all year long.

8. Residual effects: The weed killer you plan to use on your lawn should not affect the soil. Some products prevent the growth of weeds and get accumulated in the ground, and they affect the pH of the soil badly. When the soil pH is disturbed, then definitely, the productivity of the land is reduced. Ensure the weed killer you want to use for your lawn does not affect your property’s soil because the carcinogenic substances in these weed killers can lead to soil problems.

9. Amount required: First of all, you have to decide which area you want to treat with the herbicide. If you are treating weeds for a small space, you can select the ready-to-use herbicide that does not require dilution with water, and it is also economical to buy. On the other hand, when you have a wide area full of weeds you want to treat, you should consider a concentrated product to make a solution adequate for your space. You have to calculate the size you want to treat and then decide the weed killer according to your need. There are so many herbicides in the market, but you should read sites like this and users’ reviews to select the best one for your garden.

10. Targeted weeds: There are several necessary herbicides, each targeting certain plant pests (weeds, grasses.). A non-selective herbicide tries to kill most plants, while a selective herbicide is designed to kill specific plants, usually grasses or broadleaf weeds.

11. Kid and pet-friendliness: If you have little children or pets at home, you must consider their safety as the priority and then select an herbicide for your lawn. The herbicides available in the market contain toxic ingredients that can be unsafe for kids and pets if misused. With traditional herbicides, your yard is usually safe within hours of application.

12. Price: Most people determine the affordability factor for buying any weed killer. There are expensive as well as economic weed killer products available in the market. Most of these products come from renowned brands, while others are cheaper. Make sure you look at the effectiveness and coverage area when planning to buy any product. Make sure you go for the work within your range; otherwise, expensive products will increase your lawn maintenance worries.

13. Visible results: It’s important to note that some weed killers give quick results, while others are slow to show their effectiveness visibly. In most cases, weeds will be killed within a day or two. You have to be patient enough and give some time to these products to kill the weeds effectively.

These Preventive Measures and More Will Help You Kill Weeds in Lawn in 2021

gardener learning how to kill weed in lawn
Always use gardening gloves when handling herbicides and pulling weeds.

Learning how to kill weeds in the lawn in 2021 with the right weed killer and preventative measures will help your yard look great all year long. With an active approach, your grass will have much more room to grow for a healthier, longer lifespan. We hope you found our solutions to killing weeds in your lawn, with our preferred weed treatments and applications, super simple and easy to follow.

kill weed in lawn by pulling weeds
Pulling weeds by hand can be a back-breaking job on a huge yard.

We hope you enjoyed this lawn weed guide by The Weed Wizard, a leading weed control resource for anyone searching for the best weed killer and most effective herbicides for their home and garden. When it comes to lawn and landscape care in 2021, we’re here to help with the best, to-the-point guides and weed killer ratings for a healthy landscape, and in this particular case, how to kill weeds in winter. By tending to those ugly and backbreaking-to-pull weeds, all eyes will remain on your showstopping lawn and flower beds when spring comes around.

Check out additional tools to for making your yard look great all year round below.


Gardening Gloves for Routine Weed Picking

You can’t go wrong with a good set of gardening gloves when treating weeds and gardening. Below are Amazon’s best sellers.

Bestseller No. 1
G & F 1852-3 Women Soft Jersey Garden Gloves,...
G & F 1852-3 Women Soft Jersey Garden Gloves,...
Made of 100 percent cotton; Assorted jersey gloves; Flowers print with knit wrist; PVC dots on palms
$8.59
Bestseller No. 2
6 Pairs Women Gardening Gloves with Micro-Foam...
6 Pairs Women Gardening Gloves with Micro-Foam...
PERFECT GIFT: Perfect gift for your wife and all women who love gardening
$11.53
Bestseller No. 4
DIGZ Gardener High Performance Women's Gardening...
DIGZ Gardener High Performance Women's Gardening...
Touchscreen compatible fingertips allow you to use your phone without removing the gloves
$13.06

Last update on 2021-05-11 / Affiliate links / Images from Amazon Product Advertising API


Best Stand-Up Weeding Tools for the Lawn

Below are a handful of weeding tools that a very useful for pulling weeds from rocks and hard-to-reach places.

Last update on 2021-05-11 / Affiliate links / Images from Amazon Product Advertising API


Best Selling Weed Sprayers for Applying Concentrate

Bestseller No. 1
CHAPIN 20002 2 Gallon Lawn, Sprayer, Translucent...
CHAPIN 20002 2 Gallon Lawn, Sprayer, Translucent...
2 gallon funnel-top, translucent tank for easy filling and cleaning; Made in the USA with global materials
$24.19
SaleBestseller No. 2
Chapin International 20075 Disinfectant Bleach...
Chapin International 20075 Disinfectant Bleach...
1-Gallon funnel-top, translucent tank for easy filling and cleaning; Compatible with bleach solutions and fungicides. Hose Material : Black pvc
$14.48
SaleBestseller No. 3
Chapin International 20541 1 Gallon Lawn, 1 Pack,...
Chapin International 20541 1 Gallon Lawn, 1 Pack,...
1-Gallon, translucent tank with a wide funnel top for easy filling and cleaning; Made in the USA with global materials
$19.89

Last update on 2021-05-12 / Affiliate links / Images from Amazon Product Advertising API



Sidney Saunders

Hi there, I'm Sid, a gardening and lawn care novice that loves the outdoors. The Weed Wizard was created as a way to share my experiences with you and hopefully provide you with lots of useful tips and information around the exciting world of weed maintenance, gardening, and lawn care. I also write blogs for companies in the pool, patio, and home and garden industries.

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