Answering the need for fast, broad-spectrum weed control, non-selective postemergence herbicides kill most actively growing plants on contact. This guide highlights five top options, who they’re best for, and practical buying tips. Ideal buyers include landscapers managing weed outbreaks, homeowners with invasive weeds, and commercial growers needing a rescue treatment for unwanted vegetation. A quick summary table follows to help you compare at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| Glufosinate 280 SL Herbicide (2.5 Gallons) | Farmers and large-plot managers | Broad-spectrum, fast action against resistant weeds |
| Monterey Remuda Grass and Weed Killer (32oz) | Lawn and landscape maintenance | High-concentration glyphosate with surfactant |
| Monterey Remuda Grass and Weed Killer (16oz) | Smaller yards and flexible use | Compact option with same active formulation |
| Generic Gly Star K-Plus (2.5 Gallons) | Precision large-area weed control | Potassium-based glyphosate formulation with surfactant |
| Hi-Yield (31134) Grass Killer Postemergence | Grassy weed problems in ornamentals | Targets grass growth in mixed plantings |
Southern Ag Surfactant for Herbicides Non-Ionic, 16oz
This product is an adjuvant rather than a standalone herbicide. It enhances the performance of contact herbicides by reducing surface tension and improving leaf coverage. Best for buyers who already have a preferred non-selective postemergence herbicide and want to improve results. Use with most pesticides to bolster efficacy, especially in tough weed clumps. Note that this is not a stand-alone solution for weed control.
Glufosinate 280 SL Herbicide (2.5 Gallons)
Non-selective post-emergent weed control that covers a broad range of broadleaf and grassy weeds, including resistant species. Best for large areas where rapid, broad-spectrum activity is needed and there is a need to rotate away from glyphosate-based systems. This option is especially suitable for farmers dealing with glyphosate-resistant weeds. Consideration: verify compatibility with existing crops and follow label restrictions to avoid collateral damage to desirable plants.
Monterey Remuda Grass and Weed Killer Bundled with Measuring Spoon (32oz)
Remuda is a non-selective herbicide concentrate designed for broad-spectrum control of annual and perennial grasses and many broadleaf weeds. Its 32-ounce bundle includes a measuring spoon for precise dosing, making it suitable for larger properties or professional use. Best for users needing a concentrated solution with a surfactant to maximize coverage. Caution: avoid drift onto desirable ornamentals and turf if not correctly buffered.
Monterey Remuda Grass and Weed Killer Bundled with Measuring Spoon (16oz)
This 16-ounce Remuda bundle provides a more compact option for smaller areas or homeowner use while maintaining the same active formulation and surfactant system as the 32-ounce variant. Best for yard work and garden borders where a manageable amount of concentrate is preferred. Limitation: compatibility with specific plants near ornamentals should be checked before use.
Generic Gly Star K-Plus (2.5 Gallons)
High-load, potassium-based glyphosate concentrate with a fully loaded surfactant system and no soil residual activity. Labeled for over-the-top applications on Roundup Ready crops, with systemic action from foliage to the root system. Best for large-scale weed control where glyphosate is a core component. Limitation: ensure adherence to crop-rotation restrictions and avoid applying on non-target vegetation near desirable plantings.
Buying Guide
What should you consider when choosing a non-selective postemergence herbicide?
- Weed spectrum: Check if the product targets the weeds you face (broadleaf, grasses, or both). Non-selective options typically cover a wide range of species.
- Formulation and concentration: Concentrates like Remuda require dilution; ready-to-use formats are convenient but more expensive per area covered.
- Surfactant or adjuvant needs: Some products include surfactants; others require adding a separate adjuvant for optimal leaf coverage.
- Area size: For large plots, concentrate products are cost-efficient; for small lawns, ready-to-use formulas may be simpler.
- Environmental sensitivity: Assess proximity to ornamentals, water sources, and pollinator-friendly zones to minimize drift and unintended damage.
- Resistance management: Rotate active ingredients to reduce resistance risk, especially in weed-prone fields or repetitive use scenarios.
- Safety and storage: Follow label directions for mixing, spraying conditions, storage, and disposal; observe shelf-life and temperature guidelines where applicable.
Frequently Asked Questions
- What is a non-selective postemergence herbicide? A chemical that kills most actively growing plants after emergence, used to clear bare ground or dislodge stubborn weeds.
- When should I apply these products? Apply during active weed growth and avoid application during extreme heat, drought, or windy conditions to reduce drift risk.
- Can I use adjuvants with these herbicides? Yes, adjuvants like surfactants can improve leaf coverage and uptake, but always follow label recommendations.
- Are these products safe for lawns with desirable grass? Non-selective herbicides can damage or kill existing grasses; use targeted spot applications or shield desirable plants when possible.
- What about resistant weeds? If resistance is a concern, rotate active ingredients and combine with cultural control methods to reduce pressure on any single mode of action.
- Do these products require protective gear? Follow the label for personal protective equipment (PPE) requirements to minimize exposure during mixing and spraying.