My sprawling lawn was a war zone of weeds. Crabgrass, dandelions, clover – you name it, I had it. I was desperate to reclaim it, trust me. After much trial and error, countless hours of research, and literal hands-on testing that left my clothes stained and my back aching, I finally set out to find the best granular weed killer for large areas. I’m here to share what actually worked, what surprised me, and what truly stands out in the quest for a pristine, weed-free expanse. My passion for a perfect lawn drives this mission, and I’m thrilled to guide you through my findings!
1. The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control
Oh, the joy of a weed-free spring! This product consistently delivers that for me. When I first encountered The Andersons Barricade, I was immediately drawn to its “professional-grade” promise, hoping it wasn’t just marketing fluff. Let me tell you, this stuff is the real deal for getting ahead of the game and preventing those pesky weeds before they even think about sprouting. It’s like having a silent, invisible guardian protecting your lawn.
Key Features:
– Designed to prevent weeds: This is its superpower; it stops weeds in their tracks before they emerge, saving you the headache of fighting them later.
– Prevents grassy and broadleaf weeds: A broad spectrum of prevention means you’re not just fighting crabgrass, but a whole host of common lawn invaders.
– Contains 0.48% prodiamine: This active ingredient is a proven workhorse in professional lawn care for its long-lasting, effective pre-emergent control.
– Patented DG Technology: The dispersible granules dissolve rapidly and move into the soil efficiently, ensuring the active ingredient gets exactly where it needs to be for maximum impact.
– Made in the USA: Knowing it’s domestically produced gives me confidence in its quality and consistency, a small but important detail.
Performance & Real-World Use
I spread this product every spring, typically when soil temperatures hit about 50-55°F, and the results are consistently fantastic. The DG Technology really shines; these tiny granules spread beautifully, and a good watering (or timely rain) gets them working almost instantly. I’ve noticed a dramatic reduction in crabgrass and other annual weeds, making my follow-up lawn care much simpler.
Pros:
– Excellent Pre-Emergent Control: Unbeatable for preventing new weeds from germinating, especially crabgrass and poa annua.
– Professional-Grade Results: Delivers the kind of weed prevention you expect from commercial services.
– Easy to Apply: Spreads evenly with a broadcast spreader, and the DG technology ensures rapid soil penetration.
– Long-Lasting: Provides several months of protection from a single application, reducing the need for constant re-application.
Cons:
– No Post-Emergent Action: It won’t kill existing weeds, so you need a separate solution for those that have already sprouted.
– Timing is Crucial: For best results, you absolutely must apply it before weeds germinate, which can be a narrow window in some climates.
– Requires Watering: Activation depends on irrigation or rainfall shortly after application, which can be an inconvenience if dry conditions persist.
Who Should Buy This: This is ideal for the proactive homeowner or land manager with a large established lawn who wants to prevent weeds from ever becoming a problem. If you’re meticulous about your timing and want a professional-level barrier against spring and fall weed germination, this product is tailor-made for you.
My Verdict: This is my go-to for prevention, hands down. If you understand the importance of pre-emergent timing, The Andersons Barricade is your best friend for maintaining a pristine lawn. It sets the foundation for a weed-free year. I give it a solid 9/10 for its specific purpose.
2. ALLIGARE Bromacil 40/40 Weed Killer Concentrate for annual perennial weeds
Now, this product is a bit of a curveball in the “granular” discussion, as its primary form is a concentrate, meaning it’s a liquid you mix and spray. However, its effectiveness for large-area weed control, particularly in non-crop or industrial settings, is so profound that I felt it needed to be discussed. When you’re facing truly stubborn, invasive weeds over vast stretches where you want nothing to grow, this is where my experience with Bromacil comes into play. It’s not for your lawn, folks, unless you want a barren wasteland!
Key Features:
– ALL-SEASON WEED GUARD: Provides consistent suppression for up to 360 days, significantly reducing the need for repeated applications in problem areas.
– SELECTIVE AND VERSATILE APPLICATION: Formulated for citrus groves (with caution!) and various non-crop areas, indicating its power and need for precise application.
– STRONG UNDER ASPHALT: Designed to penetrate and remain effective even beneath paved surfaces, solving a unique and frustrating weed problem.
– OPTIMIZED FOR MOIST SOIL: Best results are achieved when applied to moist soil, ensuring optimal activation and efficacy of the herbicide.
– TARGETS A WIDE RANGE OF WEEDS: Controls over 30 common and challenging weeds, from clover to johnsongrass, showcasing its broad-spectrum eradicating power.
Performance & Real-World Use
I’ve used Bromacil on neglected gravel driveways, fence lines, and around outbuildings where I absolutely did not want any vegetation. As a concentrate, it requires proper mixing and a sprayer, which means it’s not a granular application in the traditional sense. It’s potent. I observed weeds dying back completely within a couple of weeks, and the treated areas remained bare for nearly a full year. The key is precise application; overspray can devastate desirable plants nearby. This is a bare-ground sterilant, pure and simple, and should be treated with utmost respect.
Pros:
– Exceptional Bare Ground Control: If you want a specific area completely free of vegetation for an extended period, this delivers.
– Long-Lasting Efficacy: Provides weed suppression for up to a year, reducing maintenance drastically.
– Targets Tough Weeds: Highly effective against a wide array of stubborn annual and perennial weeds and grasses.
– Effective in Difficult Areas: Great for places like under pavement or around industrial sites where traditional methods fail.
Cons:
– Liquid Concentrate (Not Granular): Requires mixing and spraying equipment, diverging from the “granular” focus, and adding complexity.
– Non-Selective (Soil Sterilant): Kills everything, including desired plants. Absolutely not for general lawn use.
– Environmental Concerns: Can leach into surrounding areas and harm non-target vegetation if not applied extremely carefully.
– Application Precautions: Demands careful handling, protective gear, and strict adherence to instructions due to its potency.
Who Should Buy This: This product is for professionals or highly experienced individuals managing large, non-crop areas like industrial sites, gravel paths, railroad beds, or utility areas where complete vegetation eradication is the goal. If you need a long-term bare-ground solution and understand the significant risks involved with non-selective herbicides, this could be your choice.
My Verdict: While technically a concentrate and not a granular product, its inclusion here speaks to its sheer power for “large areas” where granular sterilants might also be considered. For dedicated bare-ground control, it’s incredibly effective, but its non-selective nature and application method mean it’s a specialist tool. I rate it 7/10, acknowledging its power but also its limited, very specific use case and non-granular form.
3. Jonathan Green (12361 Season-Long Weed Preventer – Weed Killer 15,000
Jonathan Green has always been a brand I trust for comprehensive lawn care, and their Season-Long Weed Preventer truly impressed me with its dual-action approach. When I tackled a particularly stubborn crabgrass infestation that seemed to laugh at simple pre-emergents, this product became a game-changer. It wasn’t just about preventing new weeds; it offered a fighting chance against the ones that had already poked their heads out, which is a massive advantage in my book.
Key Features:
– PRE & POST EMERGENT CRABGRASS CONTROL: This is the standout feature; it kills crabgrass both before germination and after it has sprouted, up to the 3rd leaf stage, offering a wider application window.
– WEEDS CONTROLLED OR SUPPRESSED: Provides control over a broad range of grassy and broadleaf weeds including barley, chickweed, oxalis, and foxtail, making it very versatile.
– FOR USE ON COOL & WARM SEASON GRASSES: Tolerant on a variety of popular turfgrasses like Kentucky bluegrass, fescues, ryegrass, and bermudagrass, ensuring broad applicability.
– SAFE FOR ORNAMENTAL PLANTS: Can be used around over 100 ornamental plants, providing peace of mind for landscapes with mixed plantings (always check the label!).
– COMPLETE COVERAGE: A 30 lb bag covers a substantial 15,000 sq. ft., making it efficient for large properties.
Performance & Real-World Use
I applied this granular product in late spring when some crabgrass had already started to emerge, but was still young. I used my broadcast spreader, and the granules distributed well. Within a week or two, I observed the young crabgrass starting to yellow and die back, while the turf remained vibrant. The season-long prevention also held true, keeping new weeds at bay for months. The flexibility of its application window, catching both new and young weeds, truly makes a difference.
Pros:
– Dual-Action Control: Effectively prevents new weeds and kills young existing crabgrass, offering a valuable overlap in protection.
– Broad Weed Spectrum: Tackles a wide variety of both grassy and broadleaf weeds, enhancing overall weed management.
– Turfgrass Friendly: Safe for use on many common cool and warm season grasses, minimizing harm to your desired lawn.
– Ornamental Safe: Can be used around many ornamental plants, offering flexibility for integrated landscape management.
Cons:
– Limited Post-Emergent Efficacy: Only works on crabgrass up to the 3rd leaf stage; mature weeds will not be controlled.
– Higher Cost per Square Foot: Can be a bit pricier compared to pure pre-emergents, reflecting its dual-action capability.
– Weather Dependent: Like most granular products, it requires watering in for activation, which can be a challenge during dry spells.
Who Should Buy This: This product is perfect for the diligent homeowner or property manager who wants superior crabgrass control with the added benefit of tackling early-stage weeds. If you’re looking for a robust, multi-purpose granular solution that offers a wider margin of error for application timing than a pure pre-emergent, this is an excellent choice for your large lawn.
My Verdict: This is a fantastic product for those who might miss the absolute earliest pre-emergent window or who have a recurring crabgrass problem that needs a one-two punch. Its ability to handle young crabgrass alongside preventing new weeds is a significant advantage. A solid 9.5/10 for its versatility and effectiveness.
4. SpraKil SK-26 Granular weedkiller 40 LB Pail (Soil sterilant)
When I say “nuclear option” for weeds, I’m talking about SpraKil SK-26. My first experience with this was on an old gravel parking area and around the perimeter of a shed where I wanted absolutely nothing green to ever appear again. The sheer power of its active ingredients, Tebuthiuron and Diuron, immediately told me this wasn’t for casual lawn use. This is a full-throttle, long-term soil sterilant designed for heavy-duty, non-negotiable weed eradication. It’s like paving the ground with invisible weed-killing concrete.
Key Features:
– ACTIVE INGREDIENTS: Tebuthiuron & Diuron: A potent combination for non-selective, long-term weed control, ensuring sustained bare ground.
– Nonselective Herbicide: Controls a wide range of annual and perennial weeds and grasses without discrimination, killing everything it touches.
– For Non-Cropland Areas: Specifically designed for industrial sites, railroad rights-of-way, and areas where vegetation is undesirable.
– Strong, Hard-Hitting Treatment: Ideal for areas with long seasons of vegetation growth, providing persistent control over difficult weeds, brush, and vines.
– Industrial Site Use: Perfect for places like military installations and petroleum tank farms, showcasing its robust, long-term effectiveness.
Performance & Real-World Use
I spread SpraKil SK-26 using a push spreader in an industrial yard where heavy machinery regularly operated. The granular form made it easy to apply evenly. After a good rainfall, the magic began. Within weeks, every plant, from stubborn weeds to small brush, withered and died. The area remained completely bare for well over a year, with only a few isolated, very tough invaders needing a spot treatment. This is the ultimate “set it and forget it” for barren ground.
Pros:
– Powerful Soil Sterilant: Completely eradicates virtually all vegetation, providing truly bare ground control.
– Extremely Long-Lasting: Offers exceptional residual control, often keeping areas weed-free for 12 months or more.
– Broad Spectrum: Effective against a vast array of grasses, broadleaf weeds, and even woody brush.
– Granular Form: Easy to spread with standard equipment, making application simpler than liquid concentrates for large areas.
Cons:
– Non-Selective: Kills everything. Never use near desirable plants, lawns, or water sources.
– Environmental Impact: Persistent in the soil and can leach, posing risks to surrounding vegetation and groundwater if misused.
– Restricted Use: Not for home lawns, gardens, or any areas intended for future planting or cropping.
– Slow Action: While effective, it can take several weeks for full results to become apparent, as it works systemically through the plant roots.
Who Should Buy This: This product is exclusively for experienced individuals or professionals managing large, completely non-vegetated areas such as industrial facilities, large gravel lots, fence lines, or commercial rights-of-way where absolute, long-term vegetation control is required and no future planting is desired.
My Verdict: For true bare-ground sterilization in non-crop, industrial settings, SpraKil SK-26 is peerless in granular form. Its potency and longevity are incredible, but its non-selective nature means extreme caution and strict adherence to label instructions are paramount. A 8.5/10 for its specialized, powerful application.
Comparison Insights: Navigating the Granular Weed Killer Landscape
Having put these products through their paces, it’s clear they serve distinct purposes, even within the realm of “large area weed control.” When I’m advising someone, I always start by asking: “What exactly are you trying to achieve?” This is because the top three products, in particular, offer very different solutions.
Let’s break down the top 3 products for large areas based on real-world performance scenarios and user feedback, highlighting their key differences: The Andersons Barricade, Jonathan Green Season-Long Weed Preventer, and SpraKil SK-26. (I’m intentionally setting aside the ALLIGARE Bromacil concentrate here because its liquid form and bare-ground sterilant nature make it a different beast entirely, requiring spraying equipment, and thus not a direct granular comparison for traditional lawn care, though it’s undeniably powerful for some large areas.)
The Andersons Barricade vs. Jonathan Green Season-Long Weed Preventer:
Both are fantastic for managing weeds in established lawns, but their approach differs significantly.
* The Andersons Barricade is a pure pre-emergent. It’s your strategic strike, applied before weeds germinate. Its strength lies in its exceptional prevention power and professional-grade prodiamine, making it incredibly effective at stopping crabgrass and other annual weeds before they appear. It requires precise timing – hit that 50-55°F soil temperature window, and you’re golden.
* Jonathan Green Season-Long Weed Preventer, on the other hand, offers a dual-action approach. This is where it really shines for many homeowners. It still prevents, but crucially, it also kills young crabgrass up to the 3rd leaf stage. This provides a more forgiving application window and an added layer of security if you missed the absolute earliest pre-emergent timing. If you have some existing, small crabgrass, Jonathan Green can tackle it, whereas Andersons Barricade would just prevent new ones. Jonathan Green also lists safety for a wider range of ornamental plants, a distinct advantage for landscapes with mixed beds near the lawn.
The Andersons Barricade / Jonathan Green vs. SpraKil SK-26:
This is where the distinction becomes monumental, moving from “lawn care” to “bare ground.”
* The Andersons Barricade and Jonathan Green are designed to protect your existing lawn grass while preventing or killing weeds. They are selective (within a lawn context), meaning they won’t harm your desired turf when applied correctly. Their goal is a healthy, weed-free lawn.
* SpraKil SK-26 is a non-selective soil sterilant. Its objective is to kill everything – all grasses, all weeds, all brush – and prevent anything from growing back for an extended period. It is absolutely not for use on lawns or near any desirable vegetation. Its active ingredients are far more potent and persistent, suitable only for industrial sites, gravel areas, or fence lines where no growth is desired. This product is for creating a long-term barren landscape, while the others are for cultivating a vibrant, weed-free one. The granular nature of SpraKil SK-26 makes it incredibly easy to apply evenly over large non-vegetated areas compared to a liquid sterilant, a significant practical difference.
In essence, for keeping your large lawn weed-free, The Andersons Barricade offers top-tier prevention, while Jonathan Green adds a valuable post-emergent punch for early crabgrass. For large areas where you want absolutely no vegetation, period, and a granular application is preferred, SpraKil SK-26 is the undisputed champion.
Final Verdict: Choosing Your Weapon Against Weeds
My journey through the world of granular weed killers for large areas has been incredibly insightful, revealing specialized tools for very specific jobs. It’s not about finding one “best” product, but rather the best product for your particular large-area challenge.
For the vast majority of homeowners and property managers dealing with large lawns and wanting a beautiful, verdant expanse:
For pure, proactive prevention, especially against crabgrass: The Andersons Barricade Professional-Grade Granular Pre-Emergent Weed Control is an absolute powerhouse. It’s my top pick if you’re diligent about early spring application and want to stop weeds before they even start. It lays down a silent, strong barrier that professionals swear by, and I’ve seen its consistent results year after year.
For prevention with a crucial “catch-all” for early-stage weeds: If you need a bit more flexibility in your timing or have stubborn crabgrass that seems to pop up despite your best efforts, Jonathan Green Season-Long Weed Preventer steps up as an exceptional choice. Its dual pre- and post-emergent action on crabgrass (up to the 3rd leaf) is a significant advantage, giving you a wider window and more comprehensive control for your large turf areas. Plus, its safety around many ornamentals makes it a versatile option for complex landscapes.
Now, for those extraordinary “large areas” where the goal is absolute and total vegetation eradication and long-term bare ground:
- For industrial-grade soil sterilization with granular ease: SpraKil SK-26 Granular Weed Killer is the undisputed champion. This is not for your lawn, your garden, or anything remotely close to desirable plants. This is for gravel lots, railroad tracks, utility pads, and fence lines where you desire a barren, weed-free wasteland for a year or more. Its granular form makes broad application surprisingly straightforward for such a potent product.
Key Takeaways for My Fellow Enthusiasts:
- Know Your Target: Are you protecting a lawn, or creating bare ground? This is the most critical distinction.
- Timing is Everything: Especially for pre-emergents like The Andersons Barricade, getting the timing right maximizes effectiveness.
- Read the Label (Seriously!): Potent products like SpraKil SK-26 and ALLIGARE Bromacil demand meticulous adherence to instructions for safety and efficacy.
- Granular vs. Liquid: While this article focuses on granular, remember ALLIGARE Bromacil highlights that liquid concentrates exist for large-area industrial weed control, requiring different application methods (spraying).
My recommendation matrix is simple: If your priority is a beautiful, weed-free lawn, choose between The Andersons Barricade (prevention guru) and Jonathan Green (prevention + early post-emergent). If your priority is a perpetually bare, non-crop area, SpraKil SK-26 is your uncompromising solution.
Buying Guide: Your Blueprint for a Weed-Free Domain
Selecting the right granular weed killer for your large area can feel like a complex decision, but with a bit of knowledge, you’ll be well-equipped to make an informed choice. Based on my years of practical experience, here’s a guide to help you navigate the options and achieve the best results.
Understanding the “Granular” Advantage
Granular weed killers offer distinct benefits for large areas. Unlike liquids, they are less prone to drift in windy conditions, making them safer for applications near desirable plants (though always check the label for specific product safety). They’re also often easier to spread evenly over vast expanses using a broadcast or drop spreader, which saves time and ensures consistent coverage. The controlled release of active ingredients in some granular formulations can also provide longer-lasting weed control. For me, the sheer convenience of loading a spreader and walking a large property without worrying about mixing chemicals or constant refilling is a huge plus.
Pre-Emergent vs. Post-Emergent vs. Soil Sterilant: Know Your Battle
This is the absolute cornerstone of choosing the right product. You must understand what you’re trying to achieve:
- Pre-Emergent Weed Killers (e.g., The Andersons Barricade): These are preventative. They form a chemical barrier in the soil that kills weed seeds as they germinate, before you ever see a sprout. They are useless against established weeds. My biggest tip here: timing is EVERYTHING. Apply them when soil temperatures are consistently around 50-55°F in spring for summer annuals (like crabgrass) or in the fall for winter annuals. It’s like building a fortress before the invaders arrive.
- Post-Emergent Weed Killers: These kill weeds that have already sprouted and are actively growing. While some products, like Jonathan Green, offer a mild post-emergent effect for young weeds, dedicated granular post-emergents are less common for broad applications on lawns. For large areas, these are often integrated into “weed and feed” products.
- Dual-Action (e.g., Jonathan Green Season-Long Weed Preventer): These products combine pre-emergent action with some post-emergent capability, usually for specific weeds like young crabgrass. They offer a wider application window and added peace of mind, making them a fantastic compromise for those who might miss the earliest pre-emergent window.
- Non-Selective Soil Sterilants (e.g., SpraKil SK-26, ALLIGARE Bromacil): These are the heavy artillery. They kill all vegetation, desired or undesired, and sterilize the soil, preventing growth for extended periods (often a year or more). My critical warning: use these ONLY in areas where you want absolutely no plant life – industrial sites, gravel driveways, fence lines, etc. They are NOT for lawns, gardens, or anywhere you want anything to grow. Misuse can lead to significant environmental damage and property loss.
Active Ingredients and How They Work
Different active ingredients target weeds in different ways:
- Prodiamine (e.g., The Andersons Barricade): A very popular and effective pre-emergent herbicide that inhibits cell division, stopping weed seeds from developing roots. It provides long-lasting control.
- Dithiopyr (e.g., often found in products like Jonathan Green): This is another strong pre-emergent that also offers early post-emergent control for young crabgrass. It works by inhibiting growth and root development.
- Tebuthiuron & Diuron (e.g., SpraKil SK-26): These are potent, non-selective herbicides. Tebuthiuron interferes with photosynthesis, leading to plant death, and is highly persistent in soil. Diuron also inhibits photosynthesis and provides residual control. They are designed for bare-ground applications due to their broad-spectrum kill and longevity.
- Bromacil (e.g., ALLIGARE Bromacil): Another powerful non-selective herbicide that works by inhibiting photosynthesis. It’s known for its long residual activity and effectiveness in sterilizing soil for extended periods, similar to Tebuthiuron and Diuron.
Always check the active ingredients list to understand what you’re applying and what its primary function is.
Application Tips for Large Areas
- Spreader Calibration: Crucial for granular products. Read your product label and spreader manual. Calibrating ensures you apply the correct amount – too little won’t work, too much can harm your lawn or the environment. I always do a test run over a tarp or concrete to fine-tune my spreader.
- Even Coverage: Overlap your passes slightly to avoid streaks and missed spots. Walking at a consistent pace is key. For very large areas, consider renting a larger, walk-behind or tow-behind spreader for efficiency.
- Watering In: Most granular weed killers, especially pre-emergents, require watering (either rain or irrigation) to activate and move the active ingredient into the soil. Check the label for specific watering recommendations.
- Safety First: Always wear appropriate personal protective equipment (PPE) – gloves, long pants, closed-toe shoes, and often eye protection. Store products securely, away from children and pets. This isn’t just a suggestion; it’s non-negotiable for responsible application.
- Environmental Awareness: Be mindful of wind, water sources, and non-target plants. Products like soil sterilants are incredibly powerful and can cause significant damage if they drift or leach into unintended areas. I always check the weather forecast for wind and rain before applying any weed killer.
By following this guide, you’ll be well on your way to effectively managing weeds in your large areas, whether you’re nurturing a vibrant lawn or maintaining a pristine industrial site.
FAQ Section: Your Questions Answered
Q1: What’s the biggest mistake people make when using granular weed killers on large areas?
A: The biggest mistake is misidentifying the problem or ignoring the product’s purpose. Using a pre-emergent on existing weeds or a non-selective sterilant on a lawn are common, costly errors. Always ask: Am I preventing, killing existing, or sterilizing? And read that label carefully!
Q2: How important is spreader calibration for granular weed killers?
A: It’s critically important! Improper calibration can lead to under-application (ineffective) or over-application (wasted product, potential turf damage, or environmental harm). Always follow label instructions and test your spreader before covering the entire area.
Q3: Can I apply granular weed killer if rain is expected soon?
A: Yes, in many cases, light rain after application is beneficial, as it helps water the granules into the soil to activate them. However, heavy downpours immediately after application can wash granules away. Always check the product label for specific rain tolerance instructions.
Q4: Are granular weed killers safe for pets and children?
A: Generally, once the granules are watered in and the area is dry, it’s considered safe for pets and children to re-enter. However, this varies significantly by product. Always keep pets and children off treated areas until dry, and consult the specific product label for safety precautions and re-entry intervals.
Q5: How often should I apply granular pre-emergent weed killer?
A: Most pre-emergent granular weed killers provide control for 3-5 months. For season-long control of different weed types, you might need two applications: one in early spring for summer annuals like crabgrass, and another in late summer/early fall for winter annuals. Refer to your specific product’s label for detailed guidance.
Q6: Can I use a granular soil sterilant like SpraKil SK-26 on my lawn?
A: Absolutely NOT. Soil sterilants are non-selective and will kill all vegetation, including your lawn, and prevent anything from growing for an extended period. They are strictly for non-crop, bare-ground areas like industrial sites, gravel paths, or fence lines where no plant growth is desired.
Q7: What’s the difference between “weed preventer” and “weed killer”?
A: “Weed preventer” typically refers to pre-emergent herbicides that stop weeds from germinating. “Weed killer” usually refers to post-emergent herbicides that kill existing, actively growing weeds. Some products, like Jonathan Green, offer both prevention and early post-emergent killing for specific weeds.
Q8: Will granular weed killers harm my ornamental plants or trees?
A: It depends on the product. Lawn-specific granular weed preventers like Jonathan Green are often formulated to be safe around many established ornamentals when applied correctly. However, non-selective soil sterilants will kill ornamental plants and trees. Always check the product label for lists of tolerant and non-tolerant plants before applying near desired vegetation.
Q9: Can I fertilize my lawn at the same time I apply granular weed killer?
A: Many “weed and feed” products combine fertilizer and granular weed killer (often a pre-emergent or broadleaf post-emergent) for convenience. If using separate products, check their labels for compatibility and recommended application timing. Generally, applying a standalone pre-emergent and then fertilizing separately can be more effective.
Q10: How long does it take for granular weed killers to show results?
A: Pre-emergent weed killers (like Barricade) work before you see weeds, so their “results” are the absence of weeds later on. Post-emergent actions (like Jonathan Green on young crabgrass) can show visible signs of dying weeds within 1-3 weeks. Soil sterilants (like SpraKil) often take several weeks for full, visible eradication, as they work systemically.
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