Best Greenworks 40v Cordless String Trimmer (2026)

Maintaining a tidy garden around raised beds and irrigation lines requires precision, which is why a reliable greenworks 40v cordless string trimmer is a staple in my equipment shed. These tools offer the freedom of battery power without the maintenance headaches of gas engines.

After reviewing the latest lineup for 2026, I have found that the 40V 12 in Cordless String Trimmer stands out as the most balanced option for general yard maintenance. For those looking for a premium reach, the 40V 16 in Cordless String Trimmer provides the extra cutting capacity needed for larger plots.

When selecting the right model, consider how the weight and cutting path interact with your specific landscape. A smaller head is often safer near delicate irrigation emitters, while a wider path saves time in open lawn areas.

Quick Picks for Best Greenworks 40v Cordless String Trimmer

	Best Overall	40V 12 in Cordless String Trimmer	Cutting Width: 12 inches	Voltage: 40V	Package Contents: Battery and Charger	View Latest Price	Read Review
	Best Budget	40V 12-Inch Cordless String Trimmer	Cutting Width: 12 inches	Voltage: 40V	Package Contents: Tool Only	View Latest Price	Read Review
	Best Premium	40V 16 in Cordless String Trimmer	Cutting Width: 16 inches	Voltage: 40V	Package Contents: Tool Only	View Latest Price	Read Review
	Best Compact	40V 13 in Trimmer & Blower Combo	Cutting Width: 13 inches	Voltage: 40V	Package Contents: Trimmer and Blower	View Latest Price	Read Review
	Best Brushless	40V 13 in Cordless String Trimmer	Cutting Width: 13 inches	Voltage: 40V	Package Contents: Tool Only	View Latest Price	Read Review
	Best Value	24V 12 in String Trimmer	Cutting Width: 12 inches	Voltage: 24V	Package Contents: Battery Included	View Latest Price	Read Review
	Most Portable	Replacement Auto-Feed Spools	Cutting Width: 0.080 inch	Voltage: N/A	Package Contents: 6-Pack Spools	View Latest Price	Read Review

Selecting the right Greenworks 40V cordless string trimmer requires balancing your specific garden layout, such as navigating around raised beds or delicate irrigation lines, with the power demands of your lawn's perimeter.

How We Compared Best Greenworks 40v Cordless String Trimmer

We compared the product-listing details available for each option, including the stated use, design, and notable features. Availability and specifications can change, so confirm the current listing details before buying.

Product Comparison: Best Greenworks 40v Cordless String Trimmer (2026)

1. 40V 12 in Cordless String Trimmer

   
   
   
   Best Overall Choice
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   • Voltage40V
   • Battery2.0Ah
   • Cutting Width12 inches
   • WeightNot listed
   • Best forGeneral yard work
   • StandoutBalanced performance

   The 40V 12 in Cordless String Trimmer earns its top spot by providing a complete, ready-to-use kit for the average homeowner. It hits the sweet spot between power and maneuverability.

   This tool is ideal for gardeners who need a straightforward, reliable trimmer for tidying up edges around raised beds and garden paths.

   In my evaluation of the specs, the inclusion of the 2.0Ah battery and charger makes this a high-value purchase for those just starting their cordless tool collection.

   The primary trade-off is that the 12-inch cutting path may require more passes in larger, open sections of your lawn compared to wider models.

2. 40V 12-Inch Cordless String Trimmer

   
   
   
   Budget Friendly Option
   View Latest Price
   • Voltage40V
   • BatteryNot included
   • Cutting Width12 inches
   • WeightNot listed
   • Best forReplacing existing tools
   • StandoutCost efficiency

   If you already own Greenworks 40V batteries, the 40V 12-Inch Cordless String Trimmer is a smart way to expand your equipment fleet without extra cost.

   This model is perfectly suited for gardeners who have consolidated their battery systems and don't need redundant chargers or power cells.

   The 12-inch cutting width is sufficient for precise work, making it easy to navigate through tight corners near irrigation setups or garden borders.

   Because this is sold as a tool-only unit, you must ensure you have a compatible 40V battery on hand before purchasing.

3. 40V 16 in Cordless String Trimmer

   
   
   
   Premium Cutting Power
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   • Voltage40V
   • BatteryNot included
   • Cutting Width16 inches
   • WeightNot listed
   • Best forLarge garden areas
   • StandoutExtended cutting path

   The 40V 16 in Cordless String Trimmer is designed for those who have significant acreage and need to clear tall grass or weeds quickly.

   This trimmer is best for users who prioritize efficiency and want to minimize the time spent on routine garden maintenance.

   The wider 16-inch path allows for more coverage per swipe, which is helpful when cleaning up the perimeter of large garden beds.

   The trade-off for this increased capacity is a larger tool footprint, which may feel slightly less nimble than the 12-inch versions when working in cramped spaces.

4. 40V 13 in Trimmer & Blower Combo

   
   
   
   Versatile Garden Kit
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   • Voltage40V
   • Battery2.0Ah
   • Cutting Width13 inches
   • WeightNot listed
   • Best forComplete cleanup tasks
   • StandoutDual tool utility

   This 40V 13 in String Trimmer & 350 CFM Blower Combo is a fantastic solution for gardeners who need to trim and then clear debris from walkways.

   By packaging the trimmer with a blower, this set is perfect for those who want to keep their garden paths and patios looking professional.

   The 13-inch trimmer head provides a nice middle ground between precision and speed, fitting well into most residential gardening needs.

   The trade-off here is that sharing a single battery between two tools means you might need to manage your runtime carefully during longer cleanup sessions.

5. 40V 13 in Cordless String Trimmer

   
   
   
   Brushless Blade Efficiency
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   • Voltage40V
   • BatteryNot included
   • Cutting Width13 inches
   • WeightNot listed
   • Best forBlade-based trimming
   • StandoutIncluded replacement blades

   The 40V 13 in Cordless String Trimmer utilizes a unique blade system, which is a departure from traditional string-based feeding mechanisms.

   This model is intended for gardeners who prefer the cutting action of blades and want to avoid the hassle of spooling line.

   The 13-inch cutting width is consistent with standard trimmers, providing enough reach for most garden edges and around raised structures.

   A notable trade-off is the reliance on proprietary blades, which requires you to keep replacements on hand compared to standard trimmer line.

6. 24V 12 in String Trimmer

   
   
   
   Lightweight Value Choice
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   • Voltage24V
   • Battery3.0Ah
   • Cutting Width12 inches
   • WeightNot listed
   • Best forSmall, tight spaces
   • StandoutIncluded 3.0Ah battery

   The 24V 12 in String Trimmer is a lighter alternative for gardeners who don't require the higher power output of the 40V system.

   It is perfectly suited for smaller urban gardens or light maintenance tasks where heavy-duty power is not necessary.

   The inclusion of a 3.0Ah battery is a significant benefit, offering decent runtime for smaller yards without requiring an immediate upgrade.

   The primary trade-off is the lower voltage, which might struggle with thicker, woody weeds compared to the more robust 40V models.

7. Replacement Auto-Feed Spools

   
   
   
   Essential Maintenance Accessory
   View Latest Price
   • VoltageN/A
   • BatteryN/A
   • Cutting Width0.080 inch line
   • WeightNot listed
   • Best forRoutine maintenance
   • StandoutAuto-feed convenience

   Every gardener with a string trimmer knows that line management is the most frequent maintenance task, which makes these 0.080" Single Line Auto-Feed String Trimmer Spools essential.

   These are designed for users who want to keep their trimmer running without the downtime of winding their own line.

   The auto-feed feature helps maintain a consistent cutting length, which is vital when working near delicate irrigation components.

   The trade-off is that these are consumables; you will need to restock them regularly based on the intensity of your trimming work.

What to Look for in Best Greenworks 40v Cordless String Trimmer

Cutting Swath and Precision

When navigating tight spaces between raised garden beds, the cutting swath is your most critical consideration. The 12-inch and 13-inch models offer superior maneuverability, allowing you to trim right up to the edge of wooden sleepers or stone borders without risking damage to your irrigation hardware. A smaller swath provides the surgical precision needed to clear weeds from narrow pathways where larger 16-inch models might accidentally strike your drip lines or vegetable stems. If your garden design features intricate layouts or densely planted zones, prioritize the smaller decks to ensure you maintain a neat appearance without compromising the integrity of your garden infrastructure. Always assess the width of your garden access points to ensure the trimmer head fits comfortably without requiring awkward, damaging angles that could disrupt established soil contact zones.

Battery Compatibility and Runtime

The Greenworks 40V platform is renowned for its interchangeable battery ecosystem, which is a significant advantage for gardeners managing multiple power tools. When choosing your trimmer, consider the total area of your lawn and the number of raised beds you need to edge. A 2.0Ah battery might suffice for small, minimalist landscapes, but for larger plots with extensive perimeter fencing, a 4.0Ah or higher capacity battery is essential to avoid mid-task interruptions. Because these batteries also power blowers and other equipment, investing in high-capacity cells ensures your workflow remains uninterrupted, especially during peak growing seasons when grass growth is aggressive. Always check that your chosen trimmer kit includes a charger that fits your specific workflow, as consistent power delivery is vital for maintaining clean, professional-looking edges around your garden beds.

Weight and Ergonomic Balance

Garden maintenance often involves extended periods of standing and maneuvering, making the weight of the Greenworks 40V cordless string trimmer a major factor in user fatigue. A well-balanced tool reduces strain on your wrists and lower back, which is particularly important when you are leaning over raised beds or working in awkward positions to reach hidden corners. Look for models with adjustable auxiliary handles that allow you to customize the grip to your height and reach. The ergonomic design of the 40V series typically centers the motor weight to prevent the tool from feeling front-heavy, which is crucial for maintaining steady control near delicate irrigation emitters. If you suffer from joint discomfort, prioritizing a lighter unit will significantly improve your ability to keep your garden edges pristine throughout the entire growing season.

Shaft Type and Reach

The choice between a straight shaft and a curved shaft significantly impacts how you interact with your garden environment. Straight shafts, common in the 16-inch models, provide better reach under low-hanging shrubs and around large planters, making them ideal for gardeners with diverse landscape features. Conversely, curved shafts offer better visibility of the cutting head, which is a massive benefit when you are edging near sensitive irrigation lines or small-space growing containers. Consider the reach requirements of your specific garden layout; if you have deep, wide raised beds that are difficult to access, a straight shaft is likely superior. However, if your garden is defined by intricate, small-space layouts where visibility is key to avoiding accidental damage to your plants, a curved shaft will provide the necessary control and precision.

Auto-Feed vs. Manual Spool

Line advancement is a frequent pain point for many gardeners, and the Greenworks 40V series offers different mechanisms to manage this. An auto-feed system is highly convenient, as it automatically releases more line when the trimmer detects the need, allowing you to focus entirely on your edging path. This is particularly useful when you are working around abrasive surfaces like concrete pavers or stone borders that wear down the line quickly. However, some experienced gardeners prefer manual-feed systems for the total control they provide, preventing accidental line waste. When working near irrigation systems, an auto-feed system that is too aggressive might feed out too much line, increasing the risk of snapping a drip hose. Evaluate your comfort level with line management and select a system that aligns with your need for efficiency versus precision.

Build Quality and Durability

Because these trimmers are used in environments with varying levels of moisture and debris, build quality is paramount. The Greenworks 40V line is built to withstand the rigors of outdoor work, but you should look for models featuring robust plastic housings and high-quality metal shafts that resist corrosion from soil contact and fertilizers. Since your trimmer will likely be stored in a garden shed or garage, ensure the materials are resistant to temperature fluctuations and humidity. The durability of the guard is also vital; a sturdy, well-placed guard protects your legs from flying debris and acts as a buffer against your raised beds, preventing the spinning head from gouging the wood or stone. Investing in a model with a proven track record for longevity ensures your tool remains a reliable partner for years of seasonal maintenance.

Ease of Maintenance

Maintaining your trimmer should be an intuitive part of your garden workflow, not a chore. Look for models that allow for easy spool replacement and simple cleaning of the trimmer head after use. In environments with high soil contact, dirt and grass clippings can accumulate quickly around the motor head, potentially leading to overheating. A design that allows for quick-access cleaning ensures you can keep the ventilation ports clear, extending the life of your motor. Additionally, consider how easily you can source replacement spools and lines for your specific model. Since the Greenworks 40V platform is widely supported, finding parts is generally straightforward, but verifying that your chosen model uses a standard, easy-to-load spool system will save you significant frustration during the busy summer months when your garden needs the most attention.

Frequently Asked Questions

Can I use the Greenworks 40V trimmer near my drip irrigation system without cutting the lines?

Yes, you can safely use the Greenworks 40V trimmer near drip irrigation lines by choosing a model with a smaller 12-inch or 13-inch cutting swath for better control. The key is to maintain a steady, controlled pace and keep the trimmer head parallel to the ground. Using the edge of the guard as a guide can help you maintain a safe distance from delicate hardware. It is also advisable to use a thinner gauge line when working in tight, sensitive areas, as this reduces the risk of accidental damage if you happen to graze a tube or emitter.

How do I prevent the trimmer line from damaging my raised garden beds?

To prevent damage to raised beds, ensure your trimmer features a sturdy, well-positioned debris guard. When approaching the edge of the bed, approach at an angle that allows the guard to act as a physical buffer between the spinning line and the bed material. For wooden beds, consider attaching a small piece of protective rubber or metal to the corner of the bed to absorb any accidental contact. Additionally, keeping your line length short and using a lower power setting when edging near structures can significantly reduce the force of any accidental impacts, preserving the longevity of your garden furniture.

Is the 40V battery powerful enough for dense weeds around my garden perimeter?

The Greenworks 40V system is highly capable of handling dense weeds, provided you match the battery capacity to the workload. For heavy-duty clearing, a 4.0Ah battery is recommended, as it provides the sustained voltage necessary to keep the motor at optimal RPMs without bogging down. If you encounter particularly thick, woody stems, it is best to approach them in multiple passes rather than trying to clear them in one go. This technique prevents the motor from overheating and extends the life of your battery, ensuring you can complete your entire garden maintenance routine on a single charge.

How often should I clean the trimmer head if I am working in muddy conditions?

If you are working in muddy conditions near your garden beds, you should inspect and clean the trimmer head after every use. Mud and debris can easily pack into the crevices around the motor housing and the spool, which can lead to overheating and premature motor failure. Use a soft brush or a damp cloth to remove any caked-on dirt, and ensure the ventilation slots remain completely clear. Keeping the tool clean not only extends its lifespan but also ensures that the auto-feed mechanism functions correctly, preventing line tangles that can occur when the spool is clogged with mud.

Are these trimmers suitable for small-space growing areas like balcony gardens?

While these trimmers are primarily designed for lawns, they can be used in small-space gardens if you choose the most compact 12-inch model. However, you must be extremely cautious in tight areas to avoid damaging containers or delicate plants. If your balcony or patio garden is very confined, you might find that a smaller, dedicated hand-held tool is safer. If you do use the 40V trimmer, always wear protective eyewear and ensure that the discharge path is clear of any breakable items or sensitive vegetation that could be damaged by flying debris or the high-speed line.

What is the primary difference between the 12-inch and 16-inch models for home gardeners?

The primary difference is the cutting swath, which dictates the tool's maneuverability and power. The 12-inch model is significantly more agile, making it perfect for intricate garden layouts, raised beds, and tight corners where precision is required. The 16-inch model, however, offers a wider path, which is more efficient for large, open lawn areas where speed is the priority. If your garden is defined by complex planting zones and frequent obstacles, the 12-inch trimmer will provide a much better user experience. If you have a large, uninterrupted expanse of grass, the 16-inch model will save you time by covering more ground with each pass.

Can I use the same battery for my Greenworks 40V blower and trimmer?

Yes, one of the greatest advantages of the Greenworks 40V ecosystem is that the batteries are fully interchangeable across all tools in the same voltage class. This means you can use the same battery to power your string trimmer for edging and then immediately switch it to your blower to clear the grass clippings from your pathways and raised bed perimeters. This compatibility makes the 40V platform an incredibly efficient choice for garden maintenance, as it reduces the number of batteries you need to own and charge, streamlining your overall workflow and saving you money on duplicate power sources.

How do I store my Greenworks 40V trimmer during the winter months?

To properly store your trimmer during the winter, first ensure the unit is clean and free of debris. Remove the battery and store it in a cool, dry place at approximately 40-60% charge, as this helps maintain battery health over long periods of inactivity. If possible, hang the trimmer by its shaft in a shed or garage to prevent the head from resting on the ground, which can cause the line to become brittle or the guard to warp. Keeping the tool off the floor also protects it from moisture and potential damage from other heavy garden equipment stored nearby.

Is it difficult to replace the line on a Greenworks 40V string trimmer?

Replacing the line on a Greenworks 40V trimmer is generally very straightforward, especially with the modern spool systems used in the latest models. Most units feature a simple, tool-less cap release that allows you to drop in a pre-wound spool or manually wind new line in minutes. If you are new to the process, it is helpful to watch the specific tutorial video for your model, as there are slight variations in the winding direction and anchoring points. Once you have done it a few times, it becomes a quick, routine part of your maintenance schedule that keeps your trimmer performing at its peak.

What safety gear should I wear when using a cordless string trimmer?

Safety is paramount when using any power trimmer. You should always wear ANSI-rated safety glasses to protect your eyes from flying debris, which is especially important when working near stone borders or compacted soil. Sturdy, closed-toe shoes are essential to protect your feet, and long pants are recommended to guard against clippings and potential skin irritation. If you are working in a particularly noisy area for an extended period, wearing ear protection is also a good practice. By prioritizing this gear, you ensure that your garden maintenance remains a safe and productive activity, allowing you to focus on the task at hand without worry.