Meso 4SC V.S Tenacity

Having unwanted weeds in your garden can be a hassle. They can be difficult to remove manually and can ruin the aesthetic value of your backyard. Fortunately, the Meso 4SC and Tenacity Herbicides can help. Throughout this product review, we’ll go over:

  •  Primesource Meso 4 SC Select Review
  •  Syngenta 46256 Tenacity 8oz Herbicide Review
  • Conclusion 
  • F.A.Q.

 Primesource Meso 4 SC Select

The Primesource Meso 4 SC Select is a herbicide used to control and organize weeds on ornamentals and turfgrass. It provides control over troublesome weeds such as crabgrass, henbit, and chickweed during the establishment and seed germination stage. 

You’ll want to decide how much of Primesource Meso 4 SC you want to add to your lawn. Start by measuring the square footage (length x width) of the area and add 5-8 fl oz of Primesource Meso 4 SC Select in 30 gallons of water. Make sure to apply this herbicide on any grass species except for fine fescue. Fine fescue will reduce the grass density and reduce the aesthetics of your lawn. 

For spot treatments or smaller areas, you’ll only need 1.5 teaspoons of Meso 4SC in 1 gallon of water to treat up to 1,000 sq. ft. Next, fill a hand pump with water and with the Meso 4 SC solution. Shake the sprayer before using it and use it throughout your garden. Add the solution as needed and repeat the process until it is thoroughly mixed in the affected area.

Once you are applying the Meso 4 SC Select, make sure not to overspray. This will lead to a runoff which will lead to less optimal results. For even spray coverage, use a fan spray nozzle. Repeat this process every 2-3 weeks to get the best results. 

When should you use the Primesource Meso 4 SC Select? Use it when you notice unwanted seeds in your garden and during the growing season. It’s best to use it if the weeds are small and are starting to grow. Alternatively, you can place it during the spring or fall as a pre-emergent. 

The Primesource Meso 4 SC Select can be used for a grass seed blend that has less than 20% through fine fescue/weight. To optimize control, apply the herbicide during the grass seeding or close to its seeding as possible. 

When searching for a herbicide, you’ll want one that is not invasive. Fortunately, the Primesource Meso 4 SC Select is safe to be used for kids and pets. When using this product, always follow the PPE safety rules (wear gloves, goggles, facemask, long sleeve clothing). Make sure to keep your children and pets away from the affected areas until they have completely dried.

Overall, the Primesource Meso 4 SC Select is useful in keeping your lawn healthy and clean. Not only does it remove unwanted weeds, but it prevents them from growing as well. For those wanting to enhance the quality of their lawn, this product is a great option. 



  • Safe to Use
  • Good for Spot Treatment
  • Controls crabgrass, clover, and others


  • Complex set up

 Syngenta 46256 Tenacity 8oz Herbicide

The Syngenta 46256 Tenacity 8oz Herbicide is equipped to remove 46 different grass and broadleaf weed species. Mesotrione is its primary ingredient, and it is used to prevent photosynthesis within the plant species. This herbicide is absorbed through the roots through the plant via phloem and xylem transaction. 

Are you having difficulty removing weeds on your lawn? The Tenacity Herbicide is good for homeowners wanting to remove weed species such as dandelion, foxtail, and henbit. As we’ve stated earlier, Tenacity works as a systemic herbicide, meaning that it kills the plant by moving through its system and killing it by ending its photosynthesis process. 

To use the Tenacity herbicide, understand that 8oz of it can cover up to 1-2 acres. The 8oz needs to be mixed with water so that it can be applied throughout your backyard. There is an additional syringe included if you need more precise measurements for spot treatments. 

When in use, the Tenacity herbicide will kill the weeds quickly, but you might not notice any difference until 2-3 weeks later. For spot treating, mix ½ tsp of Tenacity with 1 ½ tsp surfactant with a gallon of water. 

Place 4-8 oz of Tenacity for every 30 gallons of water prior to weed germination for pre-emergent applications. Don’t use over 5oz for fine fescue, perennial ryegrass. Make sure that you apply the herbicide during the germination stage to prevent the weeds from growing further. 

For post emergent applications, apply 4-8oz of Tenacity per 30 gallons of water. Add a nonionic surfactant to ensure that the weeds remain low. Doing so will keep your garden in good condition and stop the weeds from sprouting outward. 

After applying the herbicide, expect up to 2-3 weeks to see results. Some grass will turn white, while other areas may need extra application. It is recommended to use surfactants with Tenacity as they will complement the herbicide and reduce surface tension in the water. This helps in killing the weeds effectively by allowing the herbicide to penetrate through the soil. 


  • Effective systemic herbicide
  • Prevents weeds germination
  • Controls up to 46 weeds species (Oxalis, White Clover, Common Dandelion)


  • May lead to grass whitening


To conclude, both products are good for lawn improvement. It’s up to you to decide which one is suited for your needs. Want something that’s less invasive? Use the Meso 4SC. If you’re serious about cleaning your lawn, then use Tenacity. Either way, you’ll have a cleaner and healthier garden when either product is in use. 


How Long Does Meso 4SC Take To Work? 

On average, it takes around 2-3 weeks for the Meso 4SC to work on your garden.

Is Meso 4SC the same as tenacity?

Both the Meso 4SC and the Tenacity have the Mesotrione ingredient. This gives them the chemical properties needed to kill off growing weeds in your backyard. 

Does Tenacity Turn Grass White?

Excessive use of tenacity can turn your grass white. This symptom will appear for 5-7 days after applying it and can last for up to several weeks.  

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Tenacity Vs Roundup

Tenacity vs. Prodiamine

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