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SEATTLE, WA, May 29, 2026 — GrassDx, a Seattle-based technology company, today announced the public launch of its free AI-powered lawn diagnosis platform at grassdx.com. The tool allows homeowners across the United States to upload up to four photos of their lawns, enter their ZIP code, and receive an instant diagnosis of lawn diseases, pest infestations, nutrient deficiencies, and other common problems — along with a personalized treatment plan tailored to their specific region, grass type, and current season.
The platform addresses a gap that has long frustrated American homeowners: professional-grade lawn diagnosis has historically required either a paid agronomist visit or expensive subscription services. GrassDx makes that level of analysis available for free, instantly, from any smartphone.
"Most lawn care advice online is generic," said a spokesperson for GrassDx. "It doesn't know whether you're in Houston in August with St. Augustine grass or in Seattle in May with fescue. Those are completely different problems with completely different treatments. GrassDx knows the difference — and that localization is what makes the diagnosis actually useful."
How GrassDx Works
Users visit grassdx.com on any device, upload one to four photos of their lawn following guided photo prompts, and enter their ZIP code. The platform's AI — built on Claude, Anthropic's large language model — analyzes the photos in the context of the user's local climate zone, typical grass types for that region, current seasonal conditions, and common regional pests and diseases. The result is a diagnosis with a confidence rating and a tiered treatment plan presented in three options: a DIY approach with specific product recommendations and Amazon purchase links, a subscription lawn care service matched to the user's region, and a professional service referral for severe or complex cases.
The platform currently identifies over 47 distinct lawn conditions including fungal diseases such as brown patch, dollar spot, and red thread; pest infestations including chinch bugs, grubs, and crane fly larvae; nutrient deficiencies; drought stress; and weed pressure from crabgrass, nutsedge, and other invasive species.
Localization as Competitive Advantage
GrassDx's ZIP code localization is the platform's central technical differentiator. A lawn diagnosis in Phoenix, Arizona in July — where the primary concern is bermudagrass heat stress and iron chlorosis in alkaline soil — is substantively different from a diagnosis in Portland, Oregon in the same month, where cool-season fescue faces a different set of fungal risks and the soil chemistry is entirely different. GrassDx accounts for these differences automatically, without requiring homeowners to understand turfgrass agronomy.
The platform has also launched a library of localized lawn care guides covering more than 30 major US cities, available at grassdx.com/blog/regional, offering city-specific seasonal calendars, grass type information, and common lawn problems for markets including Atlanta, Houston, Seattle, Chicago, Miami, Los Angeles, and New York.
Business Model and Availability
GrassDx is free for all users with no account or registration required. The platform monetizes through affiliate partnerships with lawn care product manufacturers and subscription services, and through a ZIP code-based partner program for local lawn care professionals. GrassDx is available at grassdx.com and is optimized for both desktop and mobile use.
The company is based in Seattle, Washington.
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GrassDx is a free AI-powered lawn diagnosis platform that analyzes photos of residential lawns and delivers instant, localized diagnoses and treatment plans. Founded in Seattle, Washington, GrassDx serves homeowners across the United States with ZIP code-specific recommendations for lawn care products, subscription services, and professional help. GrassDx is available at grassdx.com.