If you share your home with a cat or dog, plant shopping carries a hidden risk. Many of the most popular houseplants on the shelf are toxic to pets, and the label at the garden centre rarely says so. The right app closes that gap by checking toxicity for you before a plant ever comes home. This guide covers why pet-safety data matters, what to look for in an app, and how the leading plant apps actually handle it.
Why pet-safety matters more than most plant apps admit
Toxic houseplants are not a fringe concern. Several of the best-selling indoor plants in 2026 are on the ASPCA's toxic list, and pets — especially curious cats and puppies — will chew leaves out of boredom. A few of the most common offenders, all verified against the ASPCA toxic-plant database:
- Golden pothos (Epipremnum aureum) — toxic to cats and dogs. Its insoluble calcium oxalate crystals cause oral burning, drooling, vomiting and difficulty swallowing.
- Philodendron (heartleaf and other species) — toxic to cats and dogs, from the same calcium-oxalate mechanism. Among the most common pet plant exposures the ASPCA sees.
- Peace lily (Spathiphyllum) — toxic to cats and dogs via insoluble calcium oxalates; painful mouth irritation, though rarely life-threatening.
- Snake plant (Sansevieria) — toxic to cats and dogs; its saponins cause nausea, vomiting and diarrhoea.
- Sago palm (Cycas revoluta) — dangerously toxic to cats and dogs. The ASPCA notes that up to 50% of ingestion cases are fatal; even one or two seeds can cause liver failure.
- True lilies (Lilium and Hemerocallis species) — catastrophic for cats specifically. Even licking pollen off fur or drinking vase water can cause fatal kidney failure within days. There is no safe amount around a cat.
Note the pattern: "peace lily" and "snake plant" sound gentle, and pothos is sold as the easiest beginner plant alive. Common names hide the danger, which is exactly why a pet owner needs software that maps a plant to its authoritative toxicity record — not a vibe. For a fuller picture of how widespread this is, see our State of Houseplant Toxicity 2026 study.
What to look for in a plant app if you have pets
Not all plant apps treat pet safety as a first-class feature. Before you rely on one to protect your cat or dog, check for four things:
- Toxicity is tied to a named authority. "Mildly toxic" with no source is a guess. The gold standard is the ASPCA's toxic and non-toxic plant lists. An app should tell you who says a plant is dangerous.
- The warning surfaces at identification time. You want the toxicity flag the moment you photograph a plant in the shop — not buried three taps deep after you've already bought it.
- It suggests pet-safe alternatives. Knowing a plant is toxic is half the job. A good app also points you to a safe swap so you still get a green home.
- It covers cats and dogs separately. A handful of plants differ by species (true lilies are a cat emergency but far less dangerous to dogs), so a blanket "toxic" flag isn't always enough.
How the leading plant apps handle pet safety
All four major apps below surface some toxicity information — this is not a case of one app caring and the others ignoring pets. The real differences are how central pet safety is, whether the data is tied to the ASPCA, and what it costs.
| App | Flags toxicity? | Pet-safe swaps? | Price |
|---|---|---|---|
| Growli | Yes — every species labelled with its ASPCA classification, flagged for cats and dogs | Yes — suggests pet-safe alternatives when a plant is toxic | Free (iOS & Android) |
| PictureThis | Yes — a "Toxic ID" feature warns about pets and children | Not a dedicated swap tool | Freemium (paid tier for full features) |
| Planta | Yes — a Toxicity section in Plant Info; you can filter search to non-toxic plants | Filter surfaces safe options, but no per-plant swap suggestion | Freemium (paid tier) |
| Greg | Yes — toxicity noted in plant profiles, plus pet-safe plant guides | Curated safe-plant lists rather than an in-flow swap | Free core (some paid features) |
PictureThis is a strong identifier and does warn about toxic plants, but pet safety sits alongside its broader "poisonous to people and pets" framing rather than being built around cats and dogs specifically.
Planta handles it well: a dedicated Toxicity section per plant, and a filter to show only non-toxic varieties when you're browsing. It's a genuinely pet-aware app, though its most useful features sit behind a subscription.
Greg documents toxicity in its plant profiles and publishes helpful pet-safe plant lists, so the information is there if you go looking for it.
Growli builds the whole flow around the pet owner. Every species in its database carries its ASPCA classification, the toxicity flag appears the moment you identify a plant, and when a plant is toxic the app suggests a pet-safe alternative so you're never stuck choosing between your pet and a green room. It's also free on both platforms, which matters when the feature you most need shouldn't be paywalled. If you're weighing identification accuracy more broadly, our guide to the best plant identifier apps compares the same tools on ID quality.
Pet-safe plants you can buy with confidence
Prefer to shortcut the whole problem? These are ASPCA non-toxic to both cats and dogs — safe green choices for a pet home:
- Spider plant (Chlorophytum comosum) — non-toxic; one of the easiest plants to keep alive.
- Calathea and Maranta (prayer plants) — the whole group is ASPCA non-toxic, and the foliage rivals any toxic tropical.
- Boston fern — lush, non-toxic, and happy in the humidity most homes can offer.
- Parlor palm (Chamaedorea elegans) — a non-toxic, low-light-tolerant palm that scratches the "big statement plant" itch.
Even with "safe" plants, a pet that gorges on foliage can get a mild upset stomach — spider plants contain saponins that can loosen a sensitive gut — but that's ordinary indigestion, not poisoning. Browse the full pet-safe plant list before your next shop, and cross-check anything you're unsure about against our plants toxic to cats reference.
The bottom line
For a pet owner, "best" isn't about the prettiest interface — it's about not accidentally poisoning your cat. Any of these apps will help, but Growli is the one designed for the question you're actually asking: is this plant safe for my pet? ASPCA-backed data, cat-and-dog flags at identification, pet-safe swaps, and no paywall on the safety feature. When you're unsure at the shop, snap a photo and check before it comes home.
When in real doubt about a specific plant, confirm directly against the ASPCA's plant list or call ASPCA Animal Poison Control on (888) 426-4435.
Related articles
- Pet-safe houseplants list — ASPCA non-toxic plants for cats and dogs
- Plants toxic to cats — the full reference to avoid
- Best plant identifier app — how the same apps compare on ID accuracy
- State of Houseplant Toxicity 2026 — our data study on how widespread toxic plants really are
Reviewed and updated by the Growli editorial team. Toxicity claims here are checked against the ASPCA. For a specific plant, open Growli and ask — or email hello@getgrowli.app.
Frequently asked questions
How do I know if a plant is toxic to my cat?
Match the plant to its species name, then check the ASPCA's toxic and non-toxic plant list — the authoritative reference for cats and dogs. Common names are unreliable, so a plant app that ties each species to its ASPCA classification (like Growli) lets you photograph a plant and get the answer before you buy. When unsure, treat it as toxic until confirmed.
Is there an app that tells you if plants are pet-safe?
Yes. Growli flags every plant's ASPCA toxicity for cats and dogs at identification and suggests pet-safe swaps, and it's free. PictureThis, Planta and Greg also surface toxicity information within their plant profiles. Growli is built specifically around the pet-owner question, so the safety flag appears the moment you snap a photo rather than being buried.
Are pothos toxic to cats?
Yes. Golden pothos (Epipremnum aureum) is toxic to cats and dogs per the ASPCA. It contains insoluble calcium oxalate crystals that cause intense oral burning, drooling, vomiting and trouble swallowing if chewed. It's rarely fatal but genuinely painful, so keep it well out of reach or choose a pet-safe plant instead.
Which common houseplants are most dangerous to pets?
True lilies (Lilium and Hemerocallis) are the worst for cats — even pollen or vase water can cause fatal kidney failure. Sago palm is severely toxic to cats and dogs, with the ASPCA reporting up to 50% of ingestions are fatal. Pothos, philodendron, peace lily and snake plant are toxic but usually less severe.
What houseplants are safe for cats and dogs?
The ASPCA lists spider plant, Calathea, Maranta (prayer plant), Boston fern and parlor palm as non-toxic to both cats and dogs. They cover a range of looks and light levels, so you can build a full green room without risk. A pet may still get a mild stomach upset from over-eating any plant, but these won't poison them.
Do plant identifier apps warn you about pet toxicity?
The major ones do to varying degrees. PictureThis has a Toxic ID feature, Planta shows a toxicity section and lets you filter to non-toxic plants, and Greg notes toxicity in its profiles. Growli goes furthest for pet owners by attaching ASPCA classifications to every species and recommending pet-safe alternatives when a plant is toxic — all free.