Hi-Yield
Hi-Yield Super Concentrate Killzall Weed and Grass Killer 41%
Best heavy-duty solution for homeowners tackling stubborn vegetation and landscape clearing.
Tackle stubborn weeds and grass with Hi-Yield Super Concentrate Killzall. This powerful, non-selective herbicide is formulated for rapid action, featuring a double-surfactant system that ensures quick drying and immediate effectiveness. Ideal for clearing unwanted vegetation around driveways, fences, paths, and other hardscapes, it's also suitable for use near ornamental trees, shrubs, and flower beds. This versatile concentrate is perfect for lawn renovation, brush control, and even stump treatment, offering a comprehensive solution for complete vegetation removal where desired.
$21.42
Owner Satisfaction
4.7
/ 5
Category Rank
1
/ 525
Best Herbicides
Price vs Category Average
-78%
Below average
Formulation Type
Super Concentrate
/ Super Concentrate
Who it's for
- Gardeners battling deep-rooted, stubborn perennial weeds
- Budget-conscious homeowners managing large landscaping areas
- Landscapers needing a versatile solution for total vegetation removal
Who should skip it
- Gardeners wanting immediate visual confirmation of weed death
- Careless applicators working near delicate flowers or shrubs
- Users preferring the convenience of ready-to-use formulas
Performance breakdown
Vegetation Eradication Speed
Double-surfactant system delivers visible results faster than standard glyphosate formulas.
Application Versatility
Handles everything from driveway cracks to stubborn woody stump removal.
Concentration Potency
High-strength 41% active ingredient ensures maximum efficacy per diluted gallon.
Mixing Convenience
Requires precise measurement to avoid over-application or wasted product.
Surface Compatibility
Safe for use near established ornamentals when applied with careful precision.
Drying Efficiency
Advanced formula minimizes wait times before rain-fast protection kicks in.
Key Specs
Formulation Type
Super Concentrate
Application Rate (General)
3 tablespoons per gallon of water
Application Rate (Tough Weeds/Brush)
5 tablespoons per gallon of water
Selectivity
Non-selective
Available Sizes
16 oz, 32 oz, 1 Gallon
Features
- Fast-acting non-selective weed and grass killer
- Quick-drying double-surfactant formula
- Effective for brush and vine control
- Suitable for stump treatment
- Ideal for lawn renovation
- Use around ornamental plantings
- Versatile for hardscape areas
- Concentrated for powerful results
What customers say
Customers overwhelmingly trust Killzall for its exceptional reliability and powerful effectiveness. The 41% concentrate formula is frequently cited as superior to competitors, delivering fast and complete eradication of stubborn weeds and grasses. Users appreciate that a small amount goes a long way, providing outstanding coverage for large properties. This high concentration translates directly into excellent value for money, making it a preferred choice for serious lawn and garden maintenance.
Know before you buy
Being non-selective means this product will kill or damage almost any green plant it touches, including your grass and flowers. Use it carefully to spot-treat specific weeds or clear areas where you want no vegetation to grow.
For general weed control, mix 3 tablespoons of concentrate per gallon of water. If you are dealing with particularly tough weeds or woody brush, increase the concentration to 5 tablespoons per gallon.
Yes, this concentrate is effective for stump treatment. Apply the product directly to the freshly cut surface of the stump to prevent regrowth.
You can use it near ornamental plantings, but you must be very careful to avoid spray drift onto the leaves or stems of your desirable plants. Because it is non-selective, any contact with your flowers or shrubs will likely cause damage.
Thanks to the double-surfactant formula, this product is designed for rapid action. While visible wilting often happens quickly, the time required for a complete kill depends on the weed species and environmental conditions.
Yes, this is an excellent choice for lawn renovation. It will clear out existing grass and weeds, allowing you to start with a clean slate before planting new seed.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$21