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Shared diagnosis · May 18, 2026

other

Mixed lawn decline — thin/dead patches with weeds and possible fungal stress

Poa annua / Rhizoctonia solani / general thinning complex

What's visible: The lawn shows a widespread irregular patchwork of green clumps surrounded by straw-colored to bare dead zones covering a large portion of the surface — this is NOT a mowing stripe pattern because the color difference is true yellow/brown vs green, not a light-reflection effect. The bare/dead zones are scattered randomly across the whole lawn (not following a path or drainage line), and there are small-leafed broadleaf weeds (looks like clover or speedwell) filling in the gaps. The turf that is green appears to be surviving in clumps, consistent with a bunch-type grass like perennial ryegrass that doesn't spread to fill in dead areas on its own.

Why it's there: This lawn is showing classic signs of a struggling perennial ryegrass stand in the Pacific Northwest spring — likely a combination of winter thinning (ryegrass can be damaged by cold, wet, compacted soils over winter), possible red thread or another cool-season fungal disease that killed patches over winter/early spring, and opportunistic weed invasion filling those bare spots. Ryegrass is a bunch-type grass, meaning it cannot spread sideways to recover — once a patch dies, it stays bare until reseeded. The good news: May in Gig Harbor is the ideal window to overseed and restore this lawn before summer heat arrives.

Recommended fix

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Scotts DiseaseEx Lawn Fungicide
Targets a broad spectrum of cool-season fungal diseases including red thread and brown patch, which commonly thin out perennial ryegrass over wet Pacific Northwest winters.
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Scotts Turf Builder Thick'R Lawn Perennial Ryegrass Mix
Perennial ryegrass is a bunch-type grass that cannot fill in dead spots on its own — overseeding with fresh seed is the only way to restore the bare and thin patches you're seeing across this lawn.
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Milorganite 6-4-0 Slow-Release Nitrogen Fertilizer
A gentle slow-release organic fertilizer that feeds recovering ryegrass without burning stressed or newly seeded areas — safe to use alongside overseeding unlike synthetic quick-release options.

Always read product labels before application. Follow all safety instructions. Patch provides general guidance only and is not responsible for misuse of recommended products.

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