Pet safety
Is Holmgren's Dioon toxic to dogs?
Dioon holmgrenii
Yes — holmgren's dioon is toxic to dogs according to the ASPCA. Keep it well away from any dog that chews plants; reactions can be significant. This classification follows the ASPCA Toxic and Non-Toxic Plant List. Contains cycasin (a hepatotoxic glucoside) and BMAA neurotoxin throughout all plant tissues, including seeds, leaves, and roots. Ingestion by dogs, cats, or humans causes vomiting, diarrhoea, acute hepatic failure, and potentially fatal neurological damage. Seeds are most dangerous. Zamiaceae cycads are classified as severely toxic by ASPCA.
What to do if your dog ate holmgren's dioon
- Remove any plant material from your dog's mouth and move holmgren's dioon out of reach.
- Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
- Do not induce vomiting unless a vet or poison-control specialist instructs you to.
- Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
- Bring a leaf or photo of holmgren's dioon to the appointment so it can be treated correctly.
General guidance, not veterinary advice. If you think your dog has eaten holmgren's dioon, contact your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.
Is holmgren's dioon toxic to dogs? — FAQ
Is holmgren's dioon toxic to dogs?
Yes — holmgren's dioon is toxic to dogs according to the ASPCA. Keep it well away from any dog that chews plants; reactions can be significant. Contains cycasin (a hepatotoxic glucoside) and BMAA neurotoxin throughout all plant tissues, including seeds, leaves, and roots. Ingestion by dogs, cats, or humans causes vomiting, diarrhoea, acute hepatic failure, and potentially fatal neurological damage. Seeds are most dangerous. Zamiaceae cycads are classified as severely toxic by ASPCA.
What are the symptoms if a dog eats holmgren's dioon?
Contains cycasin (a hepatotoxic glucoside) and BMAA neurotoxin throughout all plant tissues, including seeds, leaves, and roots. Ingestion by dogs, cats, or humans causes vomiting, diarrhoea, acute hepatic failure, and potentially fatal neurological damage. Seeds are most dangerous. Zamiaceae cycads are classified as severely toxic by ASPCA. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your dog has had access to holmgren's dioon.
What should I do if my dog ate holmgren's dioon?
Stay calm. Remove any plant from your dog's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice; a leaf or photo helps the vet treat it correctly.
Is holmgren's dioon toxic to cats too?
The ASPCA classification Growli uses applies to both cats and dogs: Holmgren's Dioon is toxic to cats as well. See the full holmgren's dioon pet-safety guide for both species.
What is a dog-safe alternative to holmgren's dioon?
For a similar look without the risk, see the best dogs-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.
Full holmgren's dioon pet-safety
- Is holmgren's dioon toxic to cats and dogs? — the full guide for both pets
- Is holmgren's dioon toxic to cats?
- My dog ate holmgren's dioon — emergency steps
- Best dogs-safe plants — the full ASPCA non-toxic list
- Complete holmgren's dioon care guide