How Do I Kill Weeds In My Newly Seeded Lawn

how do I kill weeds in my newly seeded lawn

Struggling with the question, “How do I kill weeds in my newly seeded lawn?” Don’t worry, we have the answers you need to tackle this common gardening challenge.

To control weeds in a newly seeded lawn, consistent watering is crucial. Water your lawn two or three times a day for 15-20 minutes. If weeds persist beyond 6-8 weeks, consider using a selective herbicide to spot-spray your weeds. However, before applying any weed control to newly sprouted grass, wait until the grass has been mowed three times or at least 30 days have passed.

We have more detailed guidance on how to effectively manage weeds in your newly seeded lawn, including preventative measures and organic solutions. Stay tuned!

Understanding Weeds and Their Impact on New Lawns 

“Picture this: you’ve just sown a fresh carpet of grass. But soon, uninvited guests pop up – weeds. These plants grow where they aren’t wanted and spread alarmingly. Carried by wind, bird feed, or even your gardening tools, they quickly make your lawn their home.

Weeds do more than disrupt the visual appeal of your lawn. They compete fiercely with young grass for vital resources like sunlight, water, and nutrients. This competition often disadvantages your new turf, leading to unsightly patches of weeds disrupting the green landscape.

But why is it so challenging to control weeds on a new lawn? The answer lies in the resilience of weeds. While your new grass is still growing roots, weeds are survivalists. They thrive in various conditions – over-watered, under-watered, or compacted soil.

However, don’t lose hope! Understanding weeds is the first step toward victory. By identifying the types of weeds in your lawn, you can tailor your weed control strategies accordingly.

This article will guide you through this process, equipping you with the knowledge and tools to maintain a lush, weed-free lawn.

So, are you ready to roll up your sleeves and show these weeds who’s boss?”

Related Post: How To Take Care Of Lawn In Texas?

Preventative Measures Against Weeds: A Comprehensive Guide

1. Soil Testing: The First Line of Defense 

Before you dive into the world of lawn care, it’s crucial to start with soil testing. This process identifies the nutrient content, composition, and characteristics such as acidity or pH level in your soil. 

Armed with this information, you can tailor your soil amendments to create an optimal environment for your grass seed, giving it a strong head start against weeds.

2. Choosing the Right Grass Seed: Your Secret Weapon 

Selecting the appropriate grass seed is another potent preventative measure against weeds. Each grass species has unique requirements and thrives best under specific conditions.

By picking a grass type that suits your location and climate, you can cultivate a lush, healthy lawn that outcompetes potential weeds without harming the grass.

3. The Art of Sowing: Timing and Technique

The timing and technique of sowing your seeds can significantly impact weed growth. Ideally, sow your seeds in the cooler, rain-abundant spring and fall seasons. 

This timing assists new grass in establishing itself quickly, reducing opportunities for weeds to sprout and spread.

4. Regular Lawn Maintenance: An Ongoing Commitment 

Consistent lawn maintenance practices – watering, mowing, and fertilizing – are essential in maintaining a weed-free yard. Deep but infrequent watering encourages grass to grow deep roots, making your lawn more resilient and less prone to weed invasion. 

Mowing your grass slightly higher length shades the soil, preventing weed seeds from germinating. Regular fertilization keeps your grass healthy and better able to outcompete any intrusive weeds.

By incorporating these measures into your lawn care routine, you can effectively manage weeds without harming your grass, resulting in a healthier, more vibrant lawn.

Identifying Common Weeds

In case you have been wondering how do i kill weeds in my newly seeded lawn? You need to know the common weeds first. They include:

Crabgrass (Digitaria Ischaemum) 

crabgrass in st augustine

Crabgrass is a common and persistent weed found in many lawns. It’s an annual grassy weed that thrives in full sunlight and high temperatures. Its thick, mat-like growth habit can smother nearby grasses and plants.

Dandelion (Taraxacum Officinale) 

How Do I Kill Weeds In My Newly Seeded Lawn: Dandelion weed

Dandelions are easily identifiable by their bright yellow flowers and fluffy seed heads. This perennial weed has a deep taproot, making removing it difficult. Dandelions can spread quickly, posing a threat to new grass.

Yellow Nutsedge (Cyperus Esculentus) 

Nutsedge weed

Yellow nutsedge is a perennial sedge weed that looks like grass. It often grows faster and taller than the surrounding grass, making it easy to spot.

Nutsedge prefers moist, poorly drained areas of your lawn and can be tough to control due to its extensive system of underground tubers.

Quackgrass (Elymus Repens) 


Quackgrass is a perennial, cool-season grassy weed. It has a creeping growth habit and can quickly take over a lawn or garden if left unchecked. Its long, tapered blades and wheat-like seed heads can identify quackgrass.

Goosegrass (Eleusine Indica) 

Goosegrass weed

Goosegrass, also known as wiregrass, is a summer annual weed. This weed is a problem in compacted, worn areas of turf and lawns. Goosegrass has a prostrate growth habit, which stems from a central point.

Doveweed (Murdannia Spirata) 


Doveweed is a warm-season annual weed. It’s often mistaken for grass because it invades thin, weak, or bare spots in the lawn. Doveweed spreads quickly during wet summer months and can crowd out desirable grasses.

White Clover (Trifolium Repens) 

White clover weed

White clover is a perennial weed that you’ll often see growing in patches. It has three leaflets and white, ball-shaped flowers. While some homeowners appreciate its ability to fix nitrogen in the soil, it can be an aggressive invader in lawns.

Yellow Woodsorrel (Oxalis Stricta) 

Yellow Woodsorrel weed

Yellow woodsorrel is a perennial weed that’s often confused with clover. It has heart-shaped leaves and yellow flowers. This weed can spread by seeds and creeping stems that root at the nodes.

How Do I Kill Weeds In My Newly Seeded Lawn

Manual Weed Removal

This method involves physically removing the weeds from your garden. There are three common ways this can be done:

i) Pulling by Hand

 This technique is simple yet effective, especially when dealing with small infestations. It’s most efficient when the soil is wet, making pulling out the weed and its roots easier.

ii) Using a Garden Hoe: For larger areas, a garden hoe can cut the weeds just below the soil surface, causing them to die off due to lack of sunlight.

iii) Weed-Control Tools: For deep-rooted weeds, specialized tools can remove the entire weed, including its roots, reducing the chance of regrowth.

Organic Herbicides

Organic herbicides are made from natural ingredients and can kill weeds without harming the surrounding grass or posing a risk to pets and wildlife. Always follow the application instructions on the packaging for the best results.

Selective Herbicides

Selective herbicides target specific types of weeds without harming desired plants, such as new grass. These herbicides disrupt processes only in the targeted weeds, leaving other plants unharmed.

Precautions When Using Chemical Weed Killers


While chemical weed killers can be effective, they should be used cautiously. Always wear protective clothing and avoid application on windy days to prevent the chemical from drifting to non-target plants.

Furthermore, keep children and pets away from treated areas until the herbicide has dried completely.

Combining these techniques with regular lawn maintenance allows you to effectively control weed growth and maintain a healthy, vibrant lawn.

Post-Weed Removal Lawn Care: Steps to a Lush Green Lawn

After the hard work of weed removal, it’s essential to focus on lawn recovery. Bare spots left behind by weeds can become a new home for weed seeds if not properly handled.

  • Filling in Bare Spots

Bare spots can be an eyesore in an otherwise lush lawn. More importantly, they are prime real estate for opportunistic weeds.

These empty areas can result from excessive foot traffic, poor soil conditions, or the aftermath of weed removal.

Filling in these patches is crucial in maintaining a healthy, uniform lawn and preventing further weed invasion.

  • Reseeding Process

Reseeding is best done during the growing season of your specific grass type. Early fall is ideal for cool-season grasses, while late spring is suitable for warm-season grasses. The process involves:

  • Raking the bare spots to loosen the soil.
  • Adding a layer of compost.
  • Mixing it with the existing soil.

Following this, sprinkle enough grass seed to cover the area, rake the soil again for even distribution, and keep the spot moist until the grass establishes.

Final Thoughts

In tackling the challenge of “how do I kill weeds in my newly seeded lawn,” we’ve explored various strategies. 

We’ve discussed the importance of filling bare spots left by weeds, reseeding these areas, and maintaining a healthy, weed-free lawn. 

Implementing these tips can help transform your lawn into a lush, green oasis. Now it’s time to implement these strategies in your lawn care routine. 

Remember to share your experiences or additional tips in the comments below – your insights could be the game-changer someone else needs for their lawn!

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