Tenacity Vs Roundup

Looking for a high-quality herbicide to clean your lawn? We’ll review the Tenacity and Roundup herbicide products to determine which one works best for you. Throughout this comparison review, we’ll explain:

  • Tenacity Turf Herbicide
  • Roundup Ready-To-Use Extended Control Weed & Grass Killer
  • F.A.Q.

Tenacity Turf Herbicide Review

The Tenacity Turf Herbicide is the primary choice for garden weed removal. It features a systemic herbicide removal process that affects the entire plant. This ends the photosynthesis system in the weeds, forcing them to die out completely. 

Lawn owners like the Tenacity Turf Herbicide because it’s a selective herbicide. This means that it won’t kill all lawn types, but over 46 grass species such as Shepherd’s Purse, Wild Violet, and Windmill Grass. Thus, giving you a wide selection of garden weed species that can be easily removed from your lawn.

In addition, the Tenacity Turf Herbicide can be used for Pre Emergent and Post Emergent Applications. As a result, lawn owners can use it for any season and experience quick weed removal. On average, an 8 oz. bottle of Tenacity can cover up to 2 acres of land. That gives you enough coverage for small to medium sized lawns. 

To use for pre-emergent applications, make sure to apply it before the weed germination phase. Place at least 4-8 oz of the Tenacity Herbicide and mix it with 30 gallons of water. Spray it around the lawn evenly to ensure that it reaches the target weeds.

For post-emergent applications, you’ll have to reapply the Tenacity Turf Herbicide to ensure it works. Wait at least 1 month before reapplying, as it will aid in preventing the weeds from growing back. 

The Tenacity Turf Herbicide’s main ingredient is Mesotrione 40%. This ingredient is an organic compound that can be mixed with other compounds to extend control over the grass weeds. Tenacity is unable to kill. We’ll explain how to Mix Tenacity with Roundup in the F.A.Q. section. 

After using Tenacity, expect to see results within 1-2 months. For spot treatments, mix 1 ½ teaspoon of a surfactant and mix it with 1 teaspoon of Tenacity. It is recommended to use surfactants with Tenacity as it helps the herbicide penetrate the soil and kill the weeds effectively. 

However, excessive use of Tenacity can lead to a loss of color or burn in your lawn. This symptom will last for 5-7 days after applying it and can last for several weeks. Use the recommended serving amount to ensure that this product works effectively. 

Overall, the Tenacity Turf Herbicide is great for managing your garden. Keep it out of reach in extreme temperatures and direct sunlight. By doing this, you’ll preserve the herbicide for the long term and keep it from losing its efficiency. 


  • Can be used to kill Dandelion, Crabgrass, Thistle, and others
  • Syringe included for spot treatment
  • Mesotrionie 40% effectively removes unwanted weeds


  • Can lead to grass discoloration 

Roundup Ready-To-Use Extended Control Weed & Grass Killer

The Roundup Ready-To-Use Extended Control Weed & Grass Killer is suited for killing existing weeds and preventing new ones from sprouting in 4 months. It has a coverage area of 375 square feet, which is good for small to medium-sized lawns. 

Its highlight feature is its ability to kill weeds through their roots. Because of this, it prevents the weeds from growing exponentially in your lawn. On average, expect to see results with this herbicide in 3 hours.

The Roundup Weed & Grass Killer’s main ingredient is Glyphosate. Glyphosate has a half-life ranging from 2-197 days and works by killing woodleaf plants and grasses. Since it is systemic, it can stop the growth process of weeds and can be used for habitat restoration, especially if you’re trying to enhance the native plant establishment in your lawn. 

Another reason why people use the Roundup Weed & Grass Killer is due to its versatility. You can use this herbicide on sidewalks, patios, and driveways. Plus, it becomes rainproof 10 minutes after application, allowing you to place it virtually anywhere. 

First-time lawn owners appreciate Roundup Weed & Grass Killer’s ease of use. It can easily be refilled into another container, allowing you to apply the herbicide on larger lawns. Once filled, you can add a sprayer to aid in applying the herbicide throughout the lawn. 

When using the Roundup Weed & Grass Killer, don’t add additional water after applying it. Make sure to pour the refill in an empty container so you can apply it throughout the lawn. This herbicide works well when mixed with other products, as it will aid in its effectiveness. 

On the other hand, users complained about the quality of the sprayer. The sprayer becomes weak after extensive usage, making it good for small farms. But it is still a simple solution if you need to clear unwanted weeds in a short time period.

Basically, get the Roundup Weed & Grass Killer if you want optimal results. It contains pelargonic acid that aids the Glyphosate in clearing weeds in your lawn. You’ll experience quick weed removal while being non-invasive to your current plants by getting this product. 


  • Rainproof Time: 10 Minutes
  • Lightweight & Easy to Use
  • Versatile


  • Low sprayer quality

Conclusion – Which Is Better?

Which one is better? Use the Tenacity Turf Herbicide if you want to remove weeds from your lawn slowly. The Roundup Weed & Grass Killer is better suited for people who want results in under 24 hours. 

Both herbicides can be used for pre-and post- emergent applications, making them useful all season. In conclusion, you can get both herbicides and mix them to maximize weed removal fully. 


Will Tenacity Herbicide Kill Crabgrass?

Yes. In fact, Tenacity kills crabgrass from pre to post-emergent stage by up to four tillers. 

Can I Mow After Spraying Tenacity?

After spraying tenacity, you’ll want to wait two days before mowing your lawn. This allows the herbicide to remove unwanted weeds and gives your soil time to recover.

How Long Does Tenacity Herbicide Last?

Tenacity lasts for up to 2-5 years when inside its main container. If it’s mixed in a pump sprayer, you have to use the herbicide within 24 hours. 

Can I Mix Tenacity With Roundup?

You can mix Tenacity with Roundup. Start by pouring a ⅓ of the solution with Tenacity and another ⅓ with Roundup. Add water to the solution and spray across the desired area. By mixing both herbicides, you’ll see results faster. 

Leave a Comment