Robot Mower Edge Trimming Solutions — How to Get Clean Edges

MA MowAutonomous Editorial Team · Updated 2026-07-07 · 10 min read

The #1 complaint about robot mowers is the 2-4 inch uncut strip they leave at edges. This guide covers every solution — from the new ECOVACS Goat with built-in trimmer to manual string trimming tips to design choices that minimize edge work.

The Edge Trimming Problem

Every robot mower leaves a 2-4 inch uncut strip at edges — along fences, walls, garden beds, and around obstacles. This is because the cutting deck is offset from the mower's outer edge (to protect the blades from contact with solid objects). The result: a tidy lawn with messy edges that requires manual string trimming every 2-4 weeks.

Solution 1: Buy a Mower with Built-in Edge Trimmer (2026 Innovation)

In 2026, ECOVACS introduced the Goat O1000 LiDAR PRO with a built-in TruEdge trimmer — a string trimmer that automatically extends to cut the edge as the mower drives along fences, walls, and garden beds. This is the first robot mower to truly solve the edge problem. The TruEdge trimmer doesn't replace manual trimming entirely (you still need to trim around obstacles like trees and posts), but it eliminates 80-90% of edge work.

Solution 2: Design Your Lawn to Minimize Edges

If you don't want to buy a new mower, you can reduce edge work by design: (1) Install mowing strips (brick, plastic, metal) along fence lines and garden beds — the mower can drive right up to them. (2) Replace grass along fences and walls with mulch or gravel (no-mow strips). (3) Use raised garden beds instead of ground-level beds. (4) Remove obstacles (move kids' play equipment, garden hoses) before each mow.

Solution 3: Use a Quality String Trimmer

If you accept the manual edge-trimming chore, use the right tool. Recommended: a battery-powered string trimmer ($150-$300) from the same battery platform as your other power tools. Brands to consider: EGO, Ryobi, Milwaukee, DeWalt. Plan to string trim every 2-4 weeks during growing season — about 30-60 minutes per session for a 1/4-acre lawn.

Solution 4: Hire Edge Trimming Service

If you don't want to do edge trimming yourself but don't want a full landscaping service, hire a local handyman or neighborhood teen for 1-2 hours per month. Cost: $30-$60 per session. Much cheaper than a full landscaping service and eliminates the chore you hate most.

Solution 5: Combine Robot Mower + String Trimmer Strategically

The most cost-effective solution for most homeowners: (1) Robot mower handles 95% of mowing. (2) Battery string trimmer handles edges every 2-4 weeks. (3) Total time: 30-60 minutes per month for string trimming. This setup costs $1,650-$3,300 (robot mower + string trimmer) and eliminates 90-95% of mowing time.