Plant Identification: How to Identify Any Plant

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Last updated September 30, 2026

You got a plant as a gift with no label. A weed popped up in your garden. A neighbor’s shrub has flowers you love. Whatever the reason, knowing a plant’s name is the first step to caring for it, and to knowing if it’s safe around kids and pets. Here’s how to figure it out, from the fastest method to the most reliable.

Different leaf shapes and edges used to identify plants
Photo: Adityamadhav83, CC BY-SA 3.0, via Wikimedia Commons

Three ways to identify a plant

  1. Use a free app. Fast and usually close, but not always right.
  2. Check the clues yourself. Leaves, flowers and growth habit narrow it down.
  3. Ask an expert. Your local extension office will identify plants for free.

Method 1: plant identification apps

Plant ID apps compare your photo with millions of others and suggest matches. For common houseplants and garden flowers, they’re often right. Some well-known options:

AppCostGood for
Google Lens (in the Google app or camera)FreeQuick, general answers for almost anything
iNaturalist and SeekFreeWild plants and weeds; real people can confirm your ID
PlantNetFreeWild and garden plants, built by botanists
PictureThis and similar paid appsFree trial, then paidHouseplants, plus care tips

How to take a photo apps can read

  • Shoot in daylight, not with a flash.
  • Fill the frame with one leaf or one flower. Don’t include five plants at once.
  • Take several photos: a close-up of a leaf (top and underside), a flower if there is one, and the whole plant.
  • Use a plain background if you can, like a sheet of paper behind a leaf.

Method 2: read the clues

Botanists identify plants by looking at a few key features. You can do the same. Check each clue, then compare with photos and descriptions from a trusted source.

Leaf shape and edges

Is the leaf round, oval, heart-shaped, long and thin, or split into fingers? Are the edges smooth, toothed like a saw, or wavy?

Leaf arrangement

Look at how leaves attach to the stem. One leaf per spot, alternating up the stem? Two leaves opposite each other? Several in a ring?

Simple or compound

Is each leaf one piece, or is it made of many small leaflets on one stalk? The ZZ plant, for example, has compound leaves.

Flowers

Count the petals and note the color and shape. Flowers are the most reliable clue of all, so take a photo if your plant blooms.

Stems and sap

Is the stem square, round, woody or soft? Does a broken leaf leak milky sap? (Rubber plants and many euphorbias do.)

Smell and texture

Crush a leaf and sniff it (not for unknown wild plants). Herbs like basil, mint and lavender smell strongly. Are leaves fuzzy, waxy, thick or thin?

Also note where it’s growing: indoors or out, sun or shade, wet or dry soil, and your state. Location rules out a lot of possibilities.

Plant identification
Photo: No machine-readable author provided. Velela assumed (based on copyright claims)., CC BY-SA 2.5, via Wikimedia Commons

Identifying common houseplants

Most mystery houseplants turn out to be one of a few dozen popular species. Some quick tells:

  • Thick, glossy leaflets on upright stalks: probably a ZZ plant.
  • Stiff, sword-shaped, banded leaves: a snake plant.
  • Patterned leaves that fold up at night: a prayer plant or calathea.
  • Grassy striped leaves with dangling babies: a spider plant.
  • Round, coin-like leaves on thin stalks: a pilea.
  • Big leaves with holes or splits: likely a monstera.
  • Large, glossy oval leaves on a woody stem: a rubber plant.

Browse our houseplant care guides A–Z to compare photos side by side.

Method 3: ask an expert (free)

For a sure answer, especially for a weed, a possibly poisonous plant, or anything you plan to eat, ask a person who knows plants.

  • Your county extension office: every US state has a land-grant university with extension offices. Many have Master Gardener volunteers who identify plants from photos or samples for free. Search “[your county] extension office.”
  • iNaturalist: post your photos and local naturalists often confirm the ID within a day or two.
  • A local independent garden center: staff are usually happy to take a look.

When identification really matters: safety

Many common houseplants are toxic if pets or children chew them, including ZZ plants, snake plants, dieffenbachia and pothos. If you don’t know what a plant is, keep it out of reach until you do. The ASPCA’s online plant list lets you check a name once you have one.

Plant identification FAQs

What is the best free plant identification app?

Google Lens is the quickest for everyday use. For wild plants, iNaturalist and PlantNet are excellent free options, and iNaturalist lets real people confirm your ID.

Can I identify a plant from a picture?

Yes. Take clear daylight photos of a leaf, a flower if it has one, and the whole plant, then use an app or ask an expert.

How accurate are plant identification apps?

They’re often right for common plants, but they can mix up look-alikes, especially without flowers. Double-check anything important.

Where can I get a plant identified for free?

Your local county extension office, often through Master Gardener volunteers, or the iNaturalist community.

How do I know if an unknown plant is poisonous?

You can’t tell by looks. Identify it first, then check the ASPCA plant list or ask an expert. Keep unknown plants away from kids and pets until you know.

Sources and further reading

Now that you know what it is

Find its care guide in our houseplant care guides A–Z, or if something looks wrong, check our plant problems section.

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