Hi-Yield
Hi-Yield Killzall Extended Control
Best long-term solution for homeowners maintaining weed-free hardscapes and driveways.
Take control of unwanted vegetation with Hi-Yield Killzall Extended Control Concentrate. This powerful dual-action formula combines Glyphosate and Prodiamine to effectively kill existing weeds and prevent new growth for up to three months. Ideal for spot treatment on driveways, sidewalks, and patios where no vegetation is desired, it begins working within days for a complete kill in weeks. This non-selective herbicide offers a potent solution comparable to leading brands, ensuring a clean, weed-free environment in designated areas.
$51.99
Owner Satisfaction
4.7
/ 5
Category Rank
6
/ 548
#6 in Herbicides
Price vs Category Average
-47%
Below average
Net Content
1
/ Quart
Who it's for
- Homeowners seeking low-maintenance, long-term weed prevention
- Gardeners battling aggressive, deeply rooted perennial weeds
- Property managers clearing driveways, patios, and fence lines
Who should skip it
- Gardeners working near delicate flowers, shrubs, or lawns
- Landscapers planning to replant the area within a year
- Safety-conscious users avoiding heavy-duty chemical handling
Performance breakdown
Residual Efficacy
Three-month barrier effectively suppresses new growth in high-traffic areas.
Knockdown Speed
Visible wilting begins within days for rapid vegetation management.
Formula Versatility
Dual-action chemistry handles both grassy and broadleaf weeds with ease.
Concentration Value
Highly potent concentrate offers significant coverage for large-scale spot treatments.
Application Precision
Requires careful handling to avoid drift onto desirable landscape plants.
Surface Compatibility
Perfect for maintaining clean lines on driveways, patios, and sidewalks.
Key Specs
Net Content
1 Quart
Active Ingredients
Glyphosate and Prodiamine
Control Duration
Up to 3 months residual control
Application Type
Spot treatment concentrate
Target Weed Type
Broadleaf Weeds, Grassy Weeds
Weed Selectivity Type
Non-Selective
Application Form
Concentrate
Application Timing Type
Post-Emergent
Features
- Dual action kills weeds and prevents regrowth
- Long-lasting control up to 3 months
- Fast-acting visible results in 3-5 days
- Ideal for spot treatment
- Kills grassy and broadleaf weeds
- Non-selective total vegetation control
- Concentrated formula for efficiency
What customers say
Customers consistently praise Killzall Extended Control for its exceptional reliability and lasting effectiveness. Users report that it quickly eliminates stubborn weeds and provides significant residual control, often exceeding expectations for extended protection. This powerful performance translates directly into high perceived value. Consumers feel they are making a smart investment because the product works thoroughly the first time, reducing the need for frequent reapplication and delivering long term results.
Know before you buy
No. This is a non-selective herbicide, meaning it will kill or damage any vegetation it touches, including your desired plants. It is intended strictly for areas where you want no plant growth, such as driveways, sidewalks, and patios.
You can expect to see visible signs of wilting or browning within 3 to 5 days. A complete kill of the existing weeds typically occurs within a few weeks.
Yes. Because it contains Prodiamine, it provides residual control that prevents new weeds from germinating for up to three months after the initial application.
This is a concentrated formula, so you must dilute it with water according to the label instructions before applying it with a tank sprayer. This makes it a more efficient and cost-effective choice for larger or repeated spot treatments.
Yes, the dual-action formula is designed to eliminate both grassy and broadleaf weeds, providing comprehensive control for unwanted vegetation in your designated areas.
Still have a question?
Ask Hayley anything about this product before you decide.