Weed Control In Landscaping: Pre-Emergent Vs. Post-Emergent Method

Have those pesky weeds decide to stage a takeover? If you’re frustrated with the task, a professional landscaper with the right method and tools can help.

Our secret lies in understanding and effectively using pre- or post-emergent methods for specific weed problems. To make it easier for you, here is
our professional team’s detailed plan for weed control in landscaping and removing uninvited seedlings.

Understanding Pre-Emergent and Post-Emergent Herbicides

Pre-emergent herbicides help prevent weed growth by inhibiting seed germination, while post-emergent herbicides control existing weeds by targeting their roots.

Pre-emergent herbicides: How they work and when to use them

Pre-emergent herbicides are the superheroes of weed control, working tirelessly to save your garden from unsightly weeds. These herbicides kick into action before weed seeds have a chance to sprout.

Their superhero power lies in their ability to inhibit the growth of roots or shoots, essentially halting the germination process. This power makes them fantastic preventative measures against annual weeds like dandelions and crabgrass.

Our team typically applies them in the spring and fall when these notorious troublemakers are on the brink of sprouting to achieve optimal results.

Timing is key, as application after seed germination will render these pre-emergent herbicides ineffective. If you choose this method, get your bottle of pre-emergent herbicides ready.

Post-emergent herbicides: Controlling existing weeds

Post-emergent herbicides work once the seeds sprout and grow into weeds. We apply these agents directly onto the weed's surface. The solution travels down the plant stalk and penetrates its roots.

This process works by eliminating existing weed infestations in your garden or lawn.

However, there's no one-size-fits-all solution for applying post-emergent herbicides. Many factors, like climate conditions and the types of weeds, make a difference. Late spring is an optimal opportunity for this application as most weeds are usually in their seedling stage.
Handling post-emergent herbicides carefully leads to better control over existing weeds and is a preventive against future weed growth.

There are many different types of flowers in the grass.

Pros and Cons of Pre-Emergent and Post-Emergent Methods

Pre-emergent herbicides are a proactive approach to weed control, preventing weed seeds from germinating in the first place.

However, they have limited effectiveness on existing weeds.

On the other hand, post-emergent herbicides are effective at controlling existing weeds with immediate results.

This treatment also allows homeowners to have more control to target specific areas. However, post-emergent herbicides don’t prevent future weed growth and require repeated applications for long-term control.

Benefits and limitations of pre-emergent herbicides

Pre-emergent herbicides offer a unique advantage in weed control - they inhibit germination .

This proactive approach to weed management makes weed control manageable by providing long-lasting control and reducing treatment applications. And they're selective, so gardeners don't worry about harming prized plants while eliminating unwanted weeds.

Yet, these herbicides have their limitations. Controlling perennial or established weeds with deep root systems can be challenging for pre-emergent formulas. In such cases, relying solely on these herbicides might not work well.

Sometimes, even targeted weed control allows some weeds to escape and bloom.

Benefits and limitations of post-emergent herbicides

Post-emergent herbicides are beneficial for weed control. Firstly, they effectively kill existing weeds by traveling down the stalk and into the root system. This feature allows gardeners to target existing weeds.

Additionally, post-emergent herbicides provide quick results, immediately relieving unwanted vegetation in your landscaping. They’re suitable for spot treatments, allowing gardeners to selectively target areas without harming expensive plants.

However, always read the product label as some non-selective post-emergent herbicides kill any plant they come into contact with. Moreover, over-reliance on post-emergent herbicides may lead to the
development of herbicide-resistant weeds over time.

A person is spraying a lawn with a sprayer.

Choosing the Right Method for Weed Control

When selecting between pre- and post-emergent methods, consider what weed problem you’re targeting, like weed growth stage, and the type of plants or turf in your yard. For that reason, many homeowners rely on professional weed control landscaping companies .

Factors to consider when selecting between pre-emergent and post-emergent methods

Several factors determine choosing pre- and post-emergent weed control methods. First, identify the weed species in your lawn or garden, as each herbicide has a particular function.

Secondly, decide on a  weed control strategy. Are you looking for a proactive approach with long-lasting control (pre-emergent)? A professional can help.

Or are you overwhelmed with weeds and need a reactive approach (post-emergent) for weeds? A profession will help.

Integration of both methods for effective weed control

By integrating pre- and post-emergent practices, gardeners achieve effective weed control in landscaping their yard. This approach combines the benefits of preventing weeds from germinating with the ability to eliminate existing weeds.

Use pre-emergent herbicides before weed seeds sprout creates a barrier that stops them from growing. Meanwhile, post-emergent herbicides directly target and kill visible weeds.

Combining these two approaches allows professional gardeners to eliminate weeds in ornamental landscape projects while minimizing their impact on our beautiful landscapes. 

Best Practices for Weed Control in Landscaping

Proper timing and application of herbicides and monitoring and maintenance are essential for effective weed control in landscaping. 

Proper timing and application of herbicides

Regular monitoring and maintenance

Consistent maintenance is crucial for successful weed control in landscaping. By regularly inspecting and maintaining your outdoor space, you can identify and address weed infestations promptly.

Mowing at the right height and frequency discourages weed growth. Establishing and maintaining healthy turf is also essential, as this plays a vital role in preventing long-term weeds.

Preventing weeds through effective landscaping practices is cost-efficient rather than relying solely on herbicides. So, monitoring and maintenance keep your landscape free from pesky weeds.

Conclusion

Effective weed control in landscaping requires a combination of pre-emergent and post-emergent methods. You can achieve optimal results by using both herbicides strategically, based on the specific weed problem. Or you can rely on a professional landscaping team to manage your lawn and garden seamlessly.

Ready to Start on Your Next Project?

Call us at (763) 568-7251 or visit our quote page.

By Kent . December 6, 2025
Why wooden lake steps always fail—and why Minnetonka and Orono homeowners are switching to stone. A contractor explains the replacement.
By Kent . December 5, 2025
Your Golden Valley lawn looks properly graded. It still dies every spring. The problem isn't winter—it's clay soil that won't drain.
By Kent . December 3, 2025
Why the best Blaine patios are built at grade—and how smart drainage design protects your walkout basement. A contractor's design guide.
By Kent . December 3, 2025
What corners do Blaine builders cut on landscaping? A local contractor explains what to check—and why sandy soil is actually good news.
By Kent . December 2, 2025
What does skipping professional snow management actually cost St. Louis Park businesses? The risks go beyond inconvenience. Here's the math.
front yard landscaping
By Kent . December 1, 2025
The landscaping improvement that adds the most value isn't what you think. A St. Louis Park guide to strategic property improvements.
By Kent . November 30, 2025
Cut commercial landscape costs without looking cheap. A St. Paul property manager's guide to right-sizing maintenance for real savings.
By Kent . November 28, 2025
What separates professional commercial snow removal from amateur operations? An Orono property management guide to protecting your business.
By Kent . November 26, 2025
Year-round landscape maintenance guide for Orono businesses. Learn what commercial properties actually need each month—and what's overkill.
By Kent . November 24, 2025
Golden Valley retaining walls from the 1980s-90s are hitting critical age. Learn how to evaluate aging walls and decide between repair or replace.