§ Toxic plants · 10 plants · Checked Oct 2026
Spring bulbs toxic to cats and dogs
Bulbs, corms and the flowers they grow. The bulb itself is often the most toxic part, which matters when a dog digs. The ASPCA Animal Poison Control Center lists all 10 as toxic to cats and dogs; each one below has the signs to watch for and a severity rating from Plant Smart.
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§ 010 · The list
Every plant on this list
| Plant | Cats | Dogs | Severity |
|---|---|---|---|
| Autumn crocus Colchicum autumnale | Toxic | Toxic | Critical |
| Blue iris Iris spuria | Toxic | Toxic | Mild |
| Daffodils Narcissus spp. | Toxic | Toxic | Severe |
| European lily of the valley Convallaria majalis | Toxic | Toxic | Severe |
| Gladioli Gladiolus spp. | Toxic | Toxic | Mild |
| Hyacinth Hyacinthus orientalis | Toxic | Toxic | Moderate |
| Hyacinth subfamily Hyacinthus spp. | Toxic | Toxic | Moderate |
| Irises Iris spp. | Toxic | Toxic | Mild |
| Jonquil Narcissus jonquilla | Toxic | Toxic | Severe |
| Tulip Tulipa spp. | Toxic | Toxic | Severe |
§ 020 · If it happened
What to do if your pet ate one
Call your vet or a pet poison hotline straight away, even if your pet seems fine: the ASPCA Animal Poison Control Center, (888) 426-4435, or Pet Poison Helpline, (855) 764-7661. Both are open 24 hours and charge a fee. Have the plant or a photo of it to hand, and don’t make your pet vomit unless a vet tells you to.
§ 030 · Plant by plant
Plant by plant
Is autumn crocus toxic to cats and dogs?
Yes. Autumn crocus (Colchicum autumnale) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Critical, level 4 of 4. Signs include mouth irritation, vomiting, diarrhea, shock, damage to several organs, bone marrow suppression, drooling, belly pain, bloody diarrhea, seizures, liver failure, kidney failure, weakness and collapse. Also called autumn crocus.
Is blue iris toxic to cats and dogs?
Yes. Blue iris (Iris spuria) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Mild, level 1 of 4. Signs include drooling, vomiting, lethargy and diarrhea. Also called turkish iris.
Are daffodils toxic to cats and dogs?
Yes. Daffodils (Narcissus spp.) are toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates their effects Severe, level 3 of 4. Signs include vomiting, drooling, diarrhea, seizures, low blood pressure, tremors and irregular heartbeat. Read the full page on daffodils.
Is European lily of the valley toxic to cats and dogs?
Yes. European lily of the valley (Convallaria majalis) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Severe, level 3 of 4. Signs include vomiting, irregular heartbeat, low blood pressure, disorientation, coma, seizures and diarrhea. Also called American lily-of-the-valley and asian lily-of-the-valley.
Is gladioli toxic to cats and dogs?
Yes. Gladioli (Gladiolus spp.) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Mild, level 1 of 4. Signs include drooling, vomiting, lethargy and diarrhea.
Is hyacinth toxic to cats and dogs?
Yes. Hyacinth (Hyacinthus orientalis) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Moderate, level 2 of 4. Signs include vomiting, diarrhea, dullness or depression, tremors, allergic reactions and skin irritation. Read the full page on hyacinth.
Is hyacinth subfamily toxic to cats and dogs?
Yes. Hyacinth subfamily (Hyacinthus spp.) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Moderate, level 2 of 4. Signs include vomiting, diarrhea, skin irritation, allergic reactions, dullness or depression and tremors.
Are irises toxic to cats and dogs?
Yes. Irises (Iris spp.) are toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates their effects Mild, level 1 of 4. Signs include drooling, vomiting, lethargy and diarrhea.
Is jonquil toxic to cats and dogs?
Yes. Jonquil (Narcissus jonquilla) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Severe, level 3 of 4. Signs include vomiting, drooling, diarrhea, seizures, low blood pressure, tremors and irregular heartbeat. Also called daffodils.
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Is tulip toxic to cats and dogs?
Yes. Tulip (Tulipa spp.) is toxic to cats and dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Severe, level 3 of 4. Signs include belly pain, drooling, skin irritation, trouble breathing, heart failure, vomiting, dullness or depression and diarrhea. Read the full page on tulip.
§ 040 · Questions
Questions about spring bulbs toxic to cats and dogs
Which of these are the most dangerous?
Plant Smart rates Autumn crocus Critical, the highest of its four levels.
What should I do if my pet ate one?
Call your vet or a pet poison hotline right away, even before signs appear: the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661. Both charge a fee. Have the plant, or a photo of it, to hand.
Where does this list come from?
From the ASPCA Animal Poison Control Center's plant list, by way of Plant Smart, which adds a four-level severity rating.
Is a plant missing from this list safe?
Not necessarily. A plant can be missing because nobody has reported a case. Call your vet if your pet eats any plant and seems unwell.