Seed & Mow

Weed identifierGet to know your lawn

Got Weeds?

Let’s meet the uninvited guests.

This tool uses AI to provide identification, educational guidance and helpful resources. Responses may be inaccurate or incomplete, and plant and weed identifications are not guaranteed. Always verify recommendations, product labels, and local regulations before taking action. Personalized pesticide dosages, mixing instructions, and application schedules are not available. Uploaded photos and files are stored in private storage and shared with Pl@ntNet to assist with identification and our third-party AI providers. Do not upload photos of people, addresses, and any other personally identifiable information. Closing this page does not delete uploaded files or provider copies.

Make your first photo count

  • Whole plant

  • Leaf detail

  • Natural light

A few tips for a clearer photo

Useful photos start with context

  1. The whole plant

    Show its shape and the nearby turf. Choose one plant rather than a mixed handful.

  2. Leaves and stems

    Get a focused side view and a view from above. Leave unfamiliar plants in place; you don’t need to handle them.

  3. Flowers or seedheads, if present

    Include them when visible. If mowing removed them, record the leaves and growth pattern instead.

Meet common lawn weeds

Broadleaf, grassy weed, or sedge?

These broad groups help you decide what to inspect next. They are not a complete identification key.

Broadleaf plants

Look for a wider leaf with veins that branch. Note its outline, edge, and position on the stem; some plants sit close to the soil in a rosette.

Grassy weeds

Narrow leaves and rounded or flattened stems can suggest a grass. Look for leaves arranged in two ranks. An unwanted turfgrass can be a weed in a lawn where you want another grass.

Sedges

Narrow leaves can look like grass, but a triangular stem and leaves arranged in three ranks are useful sedge clues. Compare several visible features before choosing a name.

UC IPM: broadleaves, grasses, and sedges

A name comes before a treatment decision

First decide whether you want to keep the plant, control it, or learn more. Identification is only one part of that decision.

Check the lawn around it

What turf do you want to keep? Is it newly established? Is the unfamiliar plant scattered or taking over a patch? Record the scope before deciding on a response.

Check the next step

Compare lookalikes and consider whether more observation would change the decision. If you consider a product, check its current label for the plant, your turf, the site, and application restrictions.

Good questions

What helps identify weeds by photo?

Keep the plant in focus and show the whole plant, a leaf-and-stem close-up, and flowers or seedheads if present. Include your general region when asking for help.

Can grass itself be a weed?

Yes. A useful turfgrass in one lawn can be unwanted in another. First identify what is growing, then decide whether it belongs in the lawn you want.

Can I identify a weed without flowers?

Sometimes the leaves, stems, and growth pattern give enough detail to narrow the comparison. Mown lawns often lack flowers, which is why UC IPM’s California lawn key uses vegetative features. If details are missing, another view or later observation may be needed.

Does identifying a weed tell me what to spray?

No. Your goal, desired turf, lawn establishment, and the extent of the problem matter too. Confirm the plant and check the applicable product label before considering a treatment.

Can I use this without an account?

Yes, you can explore the photo tips and weed guide without an account.

Keep exploring

Identify weeds before treatmentUse the full observation-before-treatment guide.Trying to identify your lawn turf?Compare the grass clues.Keep a lawn treatment logRecord observations and any action you take.Mow for your grass typeKeep the desired turf in the decision.Explore Lawn Care ArticlesFind practical, source-backed lawn care guidance.
Sources and scope

Educational sources checked . Regional examples are starting points; use local extension guidance for plants in your area.