Made for homeowners, gardeners and lawn pros

Identify your grass, weeds and lawn problems

Take a photo of your lawn and Grass Identifier tells you what grass it is, what is growing in it and what is stressing it. Then you get care steps that fit that grass.

Free to start · No account required · iPhone & Android

Grass Identifier app showing a lawn scan, an AI lawn chat and a history of saved scans

What a grass scan tells you

An example of the details a scan covers, shown here for Kentucky bluegrass, one of the most common lawn grasses in the northern U.S.

Close-up of green lawn grass bladesExample

Grass species

Kentucky bluegrass

Poa pratensis

Type
Cool-season
Blade tip
Boat-shaped
Spreads by
Underground rhizomes
Mowing height
2 to 3.5 inches

Often confused with

  • Perennial ryegrass
  • Annual bluegrass
  • Rough bluegrass

How to confirm it

  • Two light lines along the midrib
  • Leaf folded in the bud
  • No claw-like auricles at the collar

Care tip

Water deeply about once a week in summer heat, and feed mostly in fall, when cool-season grass builds roots.

01

Know what is growing

Snap a patch of lawn, a single weed or a clump of clover. You get the likely grass or weed, how confident the match is and the look-alikes worth ruling out.

Grass Identifier scan screen showing lawn browning and dry patches
02

Ask about your lawn

Chat about the scan you just took. Why the patches are brown, how to get rid of clover, when to overseed and how short to mow.

Grass Identifier chat explaining how to fix brown, dry patches
03

Track every scan

Each scan is saved with its photo, so you can watch a problem spot over the season and see whether your fix is working.

Saved lawn scans with issues and favorites in Grass Identifier

See the app

Scan the lawn, read the care report, ask follow-up questions and keep every scan in one history.

Grass Identifier naming white clover in a lawn photo
Lawn browning and dry patches detected with 85% confidence
Lawn care report with health score, density and mowing height
AI lawn expert explaining what causes brown patches
History of saved lawn scans with issues and favorites

Not ready to install anything?

The free web grass identifier gives you one scan a day, no sign-up. Upload a photo and see the likely grass, weeds and lawn problems.

Try the free grass identifier

Cool-season or warm-season? Start there

Almost every lawn grass belongs to one of two groups. Knowing which one you have narrows the answer to a handful of grasses and decides when to mow, water and feed.

Cool-season grasses

Grow most in spring and fall. Common in the northern U.S., Canada and northern Europe.

  • Kentucky bluegrassBoat-shaped tip, spreads by rhizomes
  • Perennial ryegrassShiny underside, bunch-forming
  • Tall fescueWide, ridged blades with rough edges
  • Fine fescueNeedle-thin blades, likes shade

Warm-season grasses

Grow most in summer heat and turn tan after the first frost. Common in the southern U.S. and warm climates.

  • BermudagrassFine blades, runners above and below ground
  • ZoysiagrassDense, stiff blades that feel prickly
  • St. AugustinegrassBroad blades with rounded tips
  • CentipedegrassLight green, slow-growing runners

Live in the transition zone, between the two climates? Your lawn may be a mix of both groups.

How to tell which grass you have

Questions people ask

Patchy lawn and no idea why?

Scan the grass, the weeds and the brown spots in the app and get a care plan for your yard.

Free to download, with free scans every day.