Greenworks 40V Dethatcher/Scarifier 15-inch — Tool Only, 2 Interchangeable Tine Reels & Adjustable Depth

The Greenworks 40V 15-inch Dethatcher/Scarifier (tool only) is a battery-compatible lawn machine that removes thatch and surface debris with two interchangeable tine reels for dethatching or scarifying.

This cordless unit is built for homeowners who want a lightweight, low-maintenance way to revitalize turf without a gas engine. Designed to work with Greenworks 40V batteries (battery and charger sold separately), the tool combines adjustable depth control and durable stainless-steel tines so you can target matted layers, moss, and dead grass that prevent healthy growth.

How does this tool improve lawn health?

The dethatcher function lifts and extracts the compacted organic layer between soil and grass that blocks air, water, and nutrients. The scarifier option slices into the surface to relieve compaction and encourage new shoots. Both actions let seed, fertilizer, and moisture reach roots more effectively for denser turf over time.

• Two interchangeable tine reels for dethatching or scarifying
• Stainless-steel tines resist wear and maintain cutting performance
• Adjustable depth to control intensity and avoid overworking the lawn

When should I dethatch or scarify my lawn?

Timing depends on grass type: cool-season grasses respond best in early spring or early fall, while warm-season grasses should be treated in late spring to early summer after the second mowing. Avoid dethatching during drought or extreme heat; perform work when grass is actively growing and soil is slightly moist for best recovery.

• Cool-season: early spring or early fall
• Warm-season: late spring through early summer after second mowing
• Work when soil is moist but not waterlogged for optimal results

What controls and adjustments let me dial in performance?

The unit features a five-position depth adjustment that lets you fine-tune how aggressively the tines engage the turf. Depth ranges cover both scarifying and dethatching needs, enabling light surface maintenance or deeper material removal. A 15-inch working width speeds coverage while remaining maneuverable around yard features.

• Five depth positions for accurate control
• Depth settings span shallow to deeper engagement for different tasks
• Compact 15-inch path balances speed and precision

Is this easy to use and maintain?

Yes—being battery-powered eliminates gas tune-ups and reduces vibration and noise. The quick-swap tine reels transform the tool between dethatching and scarifying in minutes, and stainless-steel tines cut down on frequent replacements. Lightweight construction and simple controls make it approachable for DIY lawn care.

• Tool-only package works with Greenworks 40V battery system
• Quick-release reel system for fast attachment changes
• Stainless tines for longer life and fewer maintenance visits

Who is this for: The Greenworks 40V 15-inch dethatcher/scarifier is aimed at homeowners and small-property stewards who already own (or plan to use) Greenworks 40V batteries and want an efficient, cordless way to reduce thatch and surface compaction. It fits yards where a mid-width, lightweight tool is preferable to heavy, gas-powered equipment—ideal for routine seasonal care to promote healthier, thicker grass.