What's wrong with your lawn?
Upload a photo of the problem spot. AI identifies the likely cause with severity, urgency, and treatments matched to your grass type.
- Diseases
- Pests
- Weeds
- Nutrient deficiencies
- Environmental stress
Methodology by James Thornton, Lawn Equipment & Maintenance Expert | 20 Years. Reviewed June 12, 2026. Disease, pest, and weed candidates filtered by USDA region and current season; treatments cross-checked against grass-type herbicide safety data.
How the lawn diagnosis works
- 1
Photograph the problem area
Fill the frame with the damaged patch in daylight, including the edge where bad grass meets good — the transition pattern is often the most diagnostic feature.
- 2
Add your ZIP code
Diseases, pests, and weeds are regional and seasonal. Your ZIP narrows the candidate list to problems actually active in your area right now.
- 3
Get a ranked diagnosis
Each problem found comes with a confidence score, severity, urgency, and the visual evidence behind it — plus immediate actions and treatments that are safe for your grass type.
Diagnose is in beta. For expensive treatment decisions, confirm with your local extension office before buying products.
Lawn diagnosis FAQ
What lawn problems can the diagnosis tool identify?
The AI checks your photo against five problem classes: fungal and bacterial diseases (brown patch, dollar spot, rust, snow mold), insect pests (grubs, chinch bugs, armyworms), weeds (crabgrass, nutsedge, broadleaf invaders), nutrient deficiencies (nitrogen, iron), and environmental stress (drought, compaction, dog spots, scalping). Each finding comes with a confidence score, severity, and urgency rating.
How accurate is the AI lawn diagnosis?
Accuracy depends heavily on photo quality and how visually distinctive the problem is. The tool reports a confidence score with every finding and filters candidates by your region and the current season, so a cool-season disease will not be suggested in a hot Texas July. Diagnose is in beta: for expensive treatment decisions, confirm with your local extension office before buying products.
Why do you ask for my ZIP code?
Diseases, pests, and weeds are regional and seasonal. Your ZIP code lets the AI narrow the candidate list to problems actually active in your area right now, which significantly improves accuracy and keeps irrelevant problems out of your results.
What photo works best for a diagnosis?
Fill the frame with the problem area in bright, even daylight. Include the transition zone where damaged grass meets healthy grass — the edge pattern is often the most diagnostic feature. For suspected insect damage, a close-up of the soil line helps. Avoid shadows, dew glare, and photos taken from standing height.
Do I get treatment recommendations?
Yes. Each diagnosis includes immediate actions ranked by urgency, prevention tips, and treatment recommendations covering cultural practices, organic alternatives, and chemical products. Chemical suggestions are cross-checked against your grass type so you are never pointed at a herbicide that would damage your lawn.
Is the lawn diagnosis tool free?
You get free analyses each month — diagnoses and grass identifications share the same allowance. Creating a free account raises the monthly limit, and Premium removes it entirely along with saved history and smart reminders.