"Is this safe for my cat" is one of the most common questions a new plant owner asks, and the honest answer is that toxicity in houseplants is more common than most shoppers expect. We went through every plant in our own care database — 276 species across houseplants, succulents, herbs, garden vegetables, and trees — and checked each one against the ASPCA's toxic and non-toxic plant lists. The results below are pulled directly from that database, not estimated.
The headline numbers
| Category | Count |
|---|---|
| Total species checked | 276 |
| Flagged toxic to pets (ASPCA) | 117 |
| Not flagged toxic | 159 |
| Share of the full catalog that's toxic | 42% |
Put another way: if you picked a random plant from our full catalog with no idea what it was, there's a real chance — better than one in three — that it carries some level of risk to a cat or dog that chews on it.
Toxicity isn't spread evenly across plant types
The category breakdown is where the pattern gets genuinely useful, because toxicity risk is heavily concentrated rather than spread evenly across everything we grow indoors and out.
| Section | Toxic | Non-toxic |
|---|---|---|
| Houseplants | 97 | 84 |
| Succulents & cacti | 10 | 20 |
| Herbs | 9 | 11 |
| Trees | 1 | 24 |
| Vegetable gardening | 0 | 20 |
Houseplants carry the overwhelming majority of the toxicity flags in our entire database — 97 toxic entries, more than the other four sections combined. Vegetable garden crops, unsurprisingly, are the safest category by far: every single one of the 20 vegetables we catalog is non-toxic, since they're bred and grown to be eaten. Trees come in almost as clean, with only 1 toxic entry against 24 that are safe.
Plants that surprise people
A few of the toxic entries catch new pet owners off guard, because these plants have a wholesome, harmless reputation that doesn't match their ASPCA listing. Golden pothos and aloe vera are two of the most common houseplants in the country and both are flagged toxic to pets — aloe's gel is famous for soothing human skin, which leads some owners to assume it's harmless if a cat nibbles it, but the plant itself contains compounds that can cause vomiting and other symptoms in pets. Snake plant, recommended constantly as a beginner's first, nearly-unkillable plant, is also flagged toxic.
What "toxic" actually means here
An ASPCA toxicity flag doesn't mean a plant is lethal in a small nibble — the majority of flagged houseplants cause irritation, drooling, vomiting, or mild gastrointestinal upset rather than a life-threatening reaction, and severity depends heavily on how much is eaten and the size of the animal. That said, a flag is never something to dismiss casually: if your pet has eaten a significant amount of any flagged plant, or is showing symptoms, contact your veterinarian or the ASPCA Animal Poison Control Center right away rather than waiting to see how it plays out.
Building a pet-safe plant shelf
If you share your home with a plant-curious cat or dog, the 159 non-toxic species in our database are the place to start — prayer plant is a good example of a genuinely striking, pattern-leafed houseplant that carries no toxicity flag at all. Our full pet-safe plant list curates specifically from this non-toxic set, so you can shop with confidence rather than checking each plant one at a time. And if a plant you already own turns out to carry a flag, it doesn't necessarily mean rehoming it — simply moving it out of reach, onto a high shelf or into a room a curious pet doesn't have access to, resolves the risk for most households without giving up a plant you love.