Moss thrives in shady, compacted, and acidic soil, especially in Gig Harbor’s wet climate. We tackle the root causes with targeted treatments that protect your lawn and eliminating moss growth.
We apply a granular iron-sulfate moss suppressant that quickly blackens moss so your grass can begin to take back the space. It’s a simple, effective way to suppress moss and support better turf health.
Our Lawn Moss Treatment Includes:
Our moss treatment process is built specifically for the moss-heavy lawns of Western Washington. We train our team on HOA-compliant techniques, and homeowners often see greener, healthier grass within just a few weeks.
We use a residential-safe iron-based product to blacken and suppress moss quickly—no raking or spraying needed during the visit.
The product is safe for kids and pets after it’s been watered in, usually by rain or irrigation within the same day.
We handle the application and cleanup, and you’ll receive clear care instructions via text—no need to be home.
While this treatment targets moss, it also gives your grass room to grow. Pairing it with lawn aeration or overseeding can further improve long-term lawn health.
Moss in your lawn usually means conditions like poor drainage, heavy shade, or compacted soil. Our treatment doesn’t fix those issues directly—but it gives your lawn a fighting chance by reducing moss and allowing your grass to reclaim space.

Reasons why moss is able to grow so easily in Western Washington include:
All of these problems are addressed with our services. Combine and save services to get the best protection against lawn moss.
During our initial phone call or communication, we review to make sure our services stay compliant with your HOA, if necessary. We address your needs for your lawn and see if additional services might be required for best effect. Once this is finished, we come to your home or property to start our treatment.
We’ll apply a fast-acting granular iron-sulfate moss control using a broadcast spreader. Within hours, the moss will start to blacken as it dies back. We’ll lightly clean up any excess product from walkways, and the rest will settle into the lawn naturally.
You won’t need to be home—but you’ll get a text message with simple follow-up instructions. Just keep people and pets off the lawn until it’s been watered in (typically by rainfall or irrigation that day).
For best results, this treatment can be combined with lawn aeration or overseeding to help your grass grow stronger after the moss recedes.
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Moss thrives in the wet, shaded conditions common to yards in Gig Harbor. If your lawn has compacted soil, poor drainage, or not enough sunlight, moss can quickly outcompete grass. It’s especially aggressive in areas where turf is already weak or thinning.
While moss may look green, it doesn’t provide the same benefits as a healthy grass lawn. Moss retains moisture, can make surfaces slippery, and signals underlying issues like poor soil health or drainage. Over time, it weakens the lawn and creates an uneven, spongy surface.
The most effective approach combines mechanical removal with targeted moss-killing treatments. At OneGard, we safely remove moss using tools suited for Western Washington soil, apply lawn-safe treatments, and offer optional overseeding or aeration to restore healthy grass growth. We stop recurring lawn moss in Washington from reappearing.
Moss is a sign that your lawn’s conditions favor moss more than grass. It often points to low soil pH, excess moisture, shade, or compaction. Treating the moss without correcting these issues will only result in it coming back. We address both the moss and the cause to prevent regrowth.
Yes, especially during the rainy seasons. To learn more, visit our Seasonal Lawn Care Guide.
We’ve helped our neighbors and community in Gig Harbor recover their lawns from thick moss growth. Yours could be next. Let’s get started today.