How to Identify a Plant From a Photo: Free Apps for 2026
You find a plant at the nursery with no label. A weed pops up and you’re not sure if it’s friend or foe. You inherited a garden and have no idea what’s growing in it. The fastest way to identify a plant from a photo is a phone app, and several good ones cost nothing.
The catch is that “free” means different things. Some identifiers are free with no cap. Others give you a handful of scans and then ask for a subscription. This guide compares the free plant identifier apps worth trying in 2026, explains how photo identification works, and is honest about where every one of them still gets it wrong.
Publisher disclosure: Garden.gg builds one of the apps in this comparison. This is an editorial comparison based on the official pages and extension-service sources linked at the end, not a hands-on accuracy benchmark. Competitor information checked October 8, 2026. Free allowances change by country, platform, and promotion, so confirm the subscription screen before you accept a trial.
The short answer
- Free, no cap, works offline: Seek by iNaturalist.
- Free, no subscription, citizen science: Pl@ntNet and iNaturalist.
- Free and already on your phone: Google Lens.
- Free with a daily allowance, plus a garden record: Garden.gg, with 2 identifications per day on the free Sprout plan.
- Free to download, paid to keep scanning: PictureThis, PlantSnap, and Planta’s identification feature.
How photo identification works
Modern plant ID uses computer vision trained on millions of labeled plant photos. When you take a picture, the model:
- Reads visual features. Leaf shape, margin, vein pattern, flower structure, bark texture, and growth habit.
- Compares them against what it learned. Training sets cover tens of thousands of species; Pl@ntNet alone lists more than 80,000.
- Returns ranked guesses. The top match comes with a confidence score, and good apps show the runners-up too.
Two design choices separate the apps. The first is where the model runs. Seek runs it on your phone, so it works in a field with no signal. Most others upload the photo to a server. The second is what happens after the answer. Some apps forget the result. Others save it as an observation, add it to a plant collection, or share it with a research project.
Free plant identifier apps compared
| App | What’s free | Scan limit on free use | Keeps a record? | Offline? |
|---|---|---|---|---|
| Seek by iNaturalist | Everything. No account, no ads, no in-app purchases | None; identification runs on the device | Yes, on your phone | Yes |
| Pl@ntNet | The app and website; account optional | No cap stated on the official site | Yes, as observations when you sign in and share | Needs a connection for standard identification; check the app for offline options |
| iNaturalist | The app and website; free nonprofit | No cap stated | Yes, as observations on your account | Uploads need a connection |
| Google Lens | Visual search in the Google app and Google Photos | No cap | No plant collection | No |
| Garden.gg | Sprout plan: 2 AI identifications per day, including seed packet reading | 2 per day, resetting at midnight UTC | Yes, when you add the result to your plants or seed inventory | No |
| PictureThis | Free download with limited free scans | Limited; check before you commit | Yes, in the app’s collection | No |
| Planta | Limited free access, mainly watering | Identification requires a paid plan | Yes, for plants you add | No |
| PlantSnap | Free download with limited free snaps; sells snap packs and a subscription | Limited; check before you commit | Yes, in the app | Check before you commit |
Where we write “check before you commit,” we could not confirm a current number from the official pages. We would rather send you to the subscription screen than print a scan count that changed last month.
Seek by iNaturalist
Seek is the most genuinely free identifier on this list. It needs no account, carries no ads, and runs its model on the phone, so it works in places with no signal. Point the camera and Seek narrows from kingdom to species in real time. It does not upload your observations unless you choose to post them to iNaturalist. The trade-off is depth. Seek will often stop at genus when the photo is not distinctive enough, which is honest rather than broken.
Pl@ntNet
Pl@ntNet is a citizen-science project run by French research institutes, and its site describes it as open and free to everyone. You tell it which part of the plant you photographed, such as leaf, flower, fruit, or bark, which helps the model. Shared results feed a database of plant observations. It is strongest on wild and ornamental plants and less tuned for vegetable varieties.
iNaturalist
The full iNaturalist app gives computer-vision suggestions like Seek, then lets other naturalists confirm or correct your identification. That community review is the closest thing to a free second opinion. It suits a plant you can’t place, where waiting a day for a human answer is fine.
Google Lens
Lens is already on most phones, works on photos in your camera roll, and costs nothing. It is a visual search tool rather than a plant tool, so it gives you a likely name and a set of web results. It keeps no plant list and offers no follow-up care.
Garden.gg
Garden.gg’s identifier is part of a garden tracker. The free Sprout plan includes 2 AI identifications per day. Bloom raises that to 5 per day for $5 a month, and Harvest removes the cap. Each identification returns a common and scientific name, a confidence score, alternative matches with their own scores, and growing data such as sun, spacing, and days to harvest when the model can supply it.
It also reads seed packets. Photograph the label and Garden.gg extracts the plant name and brand, plus spacing and days to harvest when they are printed. If the result matches a plant already in your library, it says so. One tap then adds the result as a new plant, or adds a packet to your seed inventory.
The identifier runs in the cloud, so it needs a connection. It is the right choice when you want the identification to become a record you keep using, not just an answer.
Identify a plant with Garden.gg — free
PictureThis
PictureThis scored best for accuracy in both the Michigan State evaluation reported by Montana State University Extension and the Rutgers study summarized by Illinois Extension. It is also the most insistent about the paywall. The free download includes a limited number of scans, and unlimited identification, diagnosis, and care guides sit behind Premium. Check the current free allowance and renewal terms before you start a trial.
Planta
Planta is a care and watering app first. Its help center lists plant identification among the features that need a paid subscription, so it is not a free identifier.
PlantSnap
PlantSnap is free to download and sells both a subscription and packs of extra snaps, which tells you the free allowance is limited. It placed last for first-suggestion accuracy in a University of Maryland Extension test. Check the current free allowance before relying on it.
Which one for which gardener
- Hikers and foragers in the field: Seek. It works offline, and its willingness to stop at genus is a feature when the stakes are high.
- Curious about a wild plant or weed: Pl@ntNet for a fast answer, then iNaturalist if you want a person to confirm it.
- One quick lookup: Google Lens. Nothing to install.
- Vegetable and flower gardeners who keep records: Garden.gg. Identify the plant or scan the seed packet, add it to your garden, and log care and harvests against it.
- Houseplant owners who want everything in one app and will pay: PictureThis or Planta, after you read the subscription terms.
If you are choosing a full care app rather than an identifier, see our free plant care app comparison.
The four shots that make identification accurate
Most bad identifications are bad photographs. Take these four and the hit rate improves in every app:
- The leaf, filling the frame. Shape, margin, and vein pattern carry most of the diagnostic information. Get close enough that the leaf occupies the whole shot.
- The whole plant. Habit matters. A vine, a rosette, and a shrub with identical leaves are different species, and the close-up cannot tell them apart.
- Flowers or fruit if present. These are the most distinctive structures a plant has. A flowering photo is worth three leaf photos.
- The underside of a leaf. Hair, colour, and vein prominence on the underside separate several look-alike pairs that are indistinguishable from above.
Shoot in daylight without flash. Flash flattens exactly the texture the model reads. Apps that accept several photos of one plant, such as Pl@ntNet and iNaturalist, get noticeably better when you use all four.
When the AI gets it wrong
Photo identification is genuinely good, and it is not reliable enough to eat on. The extension studies agree that apps usually get the genus right and miss the species more often. A Rutgers study of six apps on 55 tree species found species-level accuracy ranging from about 41% to 84%. The failure modes are consistent and worth knowing.
Seedlings. Nearly every plant looks like every other plant at the cotyledon stage, because the first leaves are seed leaves and carry almost no species information. Montana State University Extension reports that pigweed seedlings were the hardest task for the apps tested. Wait for true leaves. This is the single most common wrong answer.
Cultivars within a species. Identifiers are trained to species level. Asking which tomato variety you are looking at is asking a question the model cannot answer from a leaf, and it will still return something confident. If variety matters, scan the seed packet instead.
Look-alike pairs with different consequences. Wild carrot and poison hemlock. Wild garlic and lily of the valley. Edible and toxic lookalikes are exactly where a confident wrong answer costs the most, and exactly where the visual differences are subtle.
Grasses. Grasses and grass-like plants are harder for apps than broadleaf plants, because the distinguishing features are small and often in the seed head.
Damaged or stressed foliage. A leaf with disease, insect damage, or nutrient burn no longer looks like the training data. Identification accuracy drops on the plants you most want identified.
Regional and light variation. A species grown in a different climate can present differently enough to shift the answer. Even on one tree, shade leaves are often larger and more deeply lobed than leaves in full sun.
The rule that follows: treat the identification as a strong hypothesis, not a fact. Check the confidence score, look at the alternatives, cross-check the scientific name against a second source such as the USDA PLANTS Database, and never eat anything on the strength of a photo ID alone.
If the plant is sick rather than unknown, that is a different problem that wants different photos. Start with our guide to diagnosing plant problems from photos, then compare tools in free plant disease diagnosis apps.
Common questions
What is the best free plant identifier app?
For identification alone, Seek by iNaturalist and Pl@ntNet are the strongest genuinely free options: no subscription and no scan cap stated on their official pages. Seek also works offline. If you want the identified plant to land in a garden record, Garden.gg’s free Sprout plan includes 2 AI identifications per day.
Is there a completely free plant identification app with no limits?
Seek by iNaturalist is free, needs no account, shows no ads, and runs identification on the phone. Pl@ntNet describes itself as open and free to everyone. iNaturalist is a free nonprofit platform. Apps such as PictureThis and PlantSnap are free to download but limit free scans and sell a subscription.
Can I identify a plant from a photo without an app?
Yes. Google Lens works on a photo already in your camera roll or in a browser, and the Pl@ntNet and iNaturalist websites accept uploaded photos. You still get better results from a sharp leaf close-up, a whole-plant shot, and any flowers or fruit.
How accurate are plant identification apps?
Good at the genus level and less reliable at the species level. A Rutgers study summarized by University of Illinois Extension found species-level accuracy between about 41% and 84% across six apps. Montana State University Extension notes apps do worse on seedlings and grasses. Treat the answer as a strong hypothesis.
Which plant identifier works offline?
Seek by iNaturalist runs its identification model on the phone, so it works without a connection. Garden.gg, Google Lens, and the other cloud-based identifiers send the photo to a server and need an internet connection.
Is it safe to eat a plant identified by an app?
No, not on the strength of a photo ID alone. Edible plants have toxic lookalikes, such as wild carrot and poison hemlock, and the visual differences are subtle. Confirm with a local expert or extension office before eating any wild plant.
Getting Started
- Create a free Garden.gg account on the web, iOS, or Android. No credit card is needed.
- Open Identify from the Plants section.
- Take the four shots above, or photograph a seed packet label, and upload the clearest one.
- Check the confidence score and the alternatives, then tap Add as New Plant or Add to Seed Inventory.
- Log the first watering, planting, or observation so the plant’s history starts today.
Create a free account and identify your first plant
Sources and Check Date
Official pages and extension sources checked October 8, 2026. This is a published-feature comparison, not a subscription purchase audit or our own accuracy benchmark.
- Seek by iNaturalist: free, no account, on-device identification, and offline use. The Seek user guide describes the camera flow.
- Pl@ntNet: “open and free to everyone,” run by CIRAD, INRAE, Inria, and IRD, with optional accounts and shared observations.
- iNaturalist: free nonprofit platform combining computer-vision suggestions with community identifications.
- Planta Help Center: free access and Premium: plant identification listed among paid features.
- PictureThis US App Store listing: free download, in-app purchases, and auto-renewing Premium.
- PlantSnap US App Store listing: free download with in-app snap packs and a subscription.
- Montana State University Extension: Plant Identification Apps, 2024 Update: genus versus species accuracy, seedlings, and grasses.
- University of Illinois Extension: How accurate are photo-based plant identification apps?: the Rutgers study figures and the shade-leaf caution.
- University of Maryland Extension: Snap It or Scrap It?: first-suggestion accuracy across apps.
- Garden.gg’s identification limits were checked against the backend tier configuration for this update; the public pricing page summarizes the plans.
Garden.gg is a free garden planner with built-in AI plant identification. Available on web, iOS, and Android.
