Greenworks 80V 21" Brushless Cordless (Push) Lawn Mower (75+ Compatible Tools), (2) 2.0Ah Batteries and 30 Minute Rapid Charger Included Review

Quick Verdict

The Greenworks 80V wins overall for traditional mowing power and value, but the Gardena wins for hands-free convenience if your yard is under 5,400 sq ft and you prioritize quiet, autonomous operation.

Side-by-Side Comparison

Where Greenworks Wins

1. Larger Cutting Capacity at Lower Price At $599.99, the Greenworks delivers a 21-inch cutting deck that can handle up to 1/2 acre—roughly four times the area of the Gardena. You get more mowing per dollar, and the dual 2.0Ah batteries provide enough runtime for most medium-sized lawns without needing to recharge mid-job.

2. Traditional Control and Versatility With a manual push design, you control exactly where and how you cut—around garden beds, under low branches, or in irregularly shaped yards. The 80V platform is also compatible with 75+ other tools (trimmers, blowers, chainsaws), so batteries and charger work across your entire yard-care lineup.

3. Better User Ratings and Warranty The Greenworks holds a 4.4/5 average from 2,640 reviews, indicating strong real-world satisfaction. Its 4-year warranty (tool + battery) beats the Gardena’s 3-year coverage, offering longer peace of mind for a lower upfront investment.

Where Gardena Wins

1. Fully Autonomous Operation The Gardena SILENO Minimo requires zero physical effort—it mows your lawn automatically on a schedule you set via Bluetooth app. You never push, steer, or empty a bag. It’s ideal for those who dislike mowing or have mobility issues.

2. Exceptional Quietness At just 58 dB, the Gardena is one of the quietest robotic mowers in its class—comparable to a normal conversation. You can mow early morning or late evening without bothering neighbors, and it won’t disrupt outdoor activities.

3. Precision for Small, Complex Lawns With its boundary wire and narrow cutting path (~8 inches), the Gardena navigates tight spaces, narrow strips, and obstacles that a 21-inch push mower struggles with. It’s perfect for small urban yards with lots of landscaping features.

Which Should You Buy?

Buy Mower A (Greenworks 80V) if:

• Your lawn is medium-sized (5,000–21,000 sq ft) and you want to mow it yourself with a traditional, powerful machine
• You value lower price, wider cutting deck, and the ability to use batteries across multiple yard tools
• You prefer manual control over complex landscaping and don’t want to install boundary wire

Buy Mower B (Gardena SILENO Minimo) if:

• Your lawn is small (under 5,400 sq ft) and you want a “set it and forget it” solution that mows while you relax
• Noise is a major concern—you need ultra-quiet operation for early/late mowing or sensitive neighbors
• Your yard has many obstacles, narrow passages, or you simply don’t want to spend time mowing yourself

Neither is ideal if: Your lawn exceeds 5,400 sq ft but you want robotic convenience—in that case, look at the larger Gardena SILENO models (like the city/comfort series). For very large lawns (over 1/2 acre), consider a Greenworks 80V self-propelled model or a gas mower.

Here is a head-to-head comparison of the Greenworks 80V 21" Push Mower and the GARDENA SILENO Minimo Robotic Mower.

Quick Verdict

The Greenworks 80V wins for overall versatility and value, offering manual control, a wider cutting path, and a stronger battery ecosystem at a slightly lower price, while the Gardena is a niche solution for small, flat lawns where automation is the priority.

Side-by-Side Comparison

Where Greenworks Wins

1. Cutting Performance & Speed: With a 21-inch steel cutting deck and manual push control, the Greenworks can handle tall, wet, or thick grass much faster than the Gardena robot. It can also mulch, bag, or side-discharge. The Gardena’s small 8-inch deck and random mowing pattern mean it takes days to cut a full lawn evenly.
2. Battery Ecosystem & Runtime: The 80V platform is shared with 75+ tools (trimmers, blowers, chainsaws). The two included 2.0Ah batteries provide roughly 45–60 minutes of runtime each, enough for a standard suburban lawn. The Gardena’s internal battery is non-removable and only lasts about 60–70 minutes of mowing before it needs to return to its charging station.
3. Customer Satisfaction: A 4.4/5 rating from 2,640 reviews reflects strong real-world reliability. The Gardena’s 3.6/5 rating (from a similar number of reviews) indicates frequent complaints about boundary wire issues, poor GPS-free navigation, and difficulty handling slopes or obstacles.

Where Gardena Wins

1. True Automation: The Gardena requires zero physical effort. You install the boundary wire, set the schedule via Bluetooth app, and it mows daily on its own, keeping grass consistently short. The Greenworks requires you to push it, start it, and empty the bag.
2. No Grass Collection: The robot mulches clippings so finely they disappear into the lawn, acting as natural fertilizer. With the Greenworks, you must either bag clippings or risk leaving visible clumps if the grass is damp.
3. Quiet & Low Maintenance: The Gardena operates at around 58 dB (whisper-quiet) and has no engine or belts to maintain. The Greenworks is louder (approx. 80–85 dB) and requires blade sharpening, battery care, and occasional deck cleaning.

Which Should You Buy?

• Buy Mower A (Greenworks 80V) if: You have a medium to large lawn (over 2,700 sq ft), any slopes or obstacles, or want a tool that can handle thick grass, leaves, or occasional neglect. It’s also the clear choice if you already own other 80V tools or want the flexibility to bag or mulch.
• Buy Mower B (Gardena SILENO Minimo) if: You have a perfectly flat, small lawn (under 2,700 sq ft), want to completely eliminate weekly mowing labor, and don’t mind installing boundary wire and troubleshooting occasional navigation errors. It’s ideal for retirees or those with mobility issues who prioritize hands-off maintenance.
• Buy Neither if: Your lawn is between 2,700 and 5,000 sq ft with complex shapes or slopes. In that case, a more capable robot (e.g., Husqvarna or Worx) or a self-propelled mower (e.g., the self-propelled Greenworks 80V) would be a better fit.