Pet safety
Is Ageratum houstonianum 'Blue Horizon'toxic to cats & dogs?
Ageratum houstonianum 'Blue Horizon'
Quick verdict — at a glance
- Toxic to cats?
- Yes — toxic
- Toxic to dogs?
- Yes — toxic
- ASPCA classification
- Toxic to pets · botanical name Ageratum houstonianum 'Blue Horizon'
Is ageratum houstonianum 'blue horizon' safe for cats and dogs?
Avoid for a pet household. Ageratum houstonianum 'Blue Horizon' is ASPCA-listed toxic to both cats and dogs; even a small chew can drive a vet visit. Plenty of look-alikes on the non-toxic side of the list — see alternatives below. This classification follows the ASPCA Toxic and Non-Toxic Plant List, the most widely used reference for companion-animal plant safety in the US and the standard most UK vets cite as well. Ageratum houstonianum is not on the ASPCA list, but it contains pyrrolizidine-type alkaloids and coumarin compounds and is generally regarded as toxic if ingested. Treat it as toxic to pets and people; ingestion can cause digestive upset and, with chronic exposure, potential liver harm. Verify with a vet if ingestion is suspected.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | Yes | Toxic to pets |
| Dogs | Yes | Toxic to pets |
What happens if a pet eats ageratum houstonianum 'blue horizon'?
Ageratum houstonianum is not on the ASPCA list, but it contains pyrrolizidine-type alkaloids and coumarin compounds and is generally regarded as toxic if ingested. Treat it as toxic to pets and people; ingestion can cause digestive upset and, with chronic exposure, potential liver harm. Verify with a vet if ingestion is suspected. Signs usually appear soon after chewing rather than hours later. If you see drooling, pawing at the mouth, head-shaking, vomiting, loss of appetite, or unusual lethargy after your pet has had access to ageratum houstonianum 'blue horizon', treat it as a suspected ingestion and act on the steps below.
What to do if your pet ate ageratum houstonianum 'blue horizon'
- Remove any plant material from your pet's mouth and move ageratum houstonianum 'blue horizon' 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 ageratum houstonianum 'blue horizon' to the appointment so it can be treated correctly.
This page is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide rather than the plant. If you are worried, always contact a vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.
Pet-safe alternatives to ageratum houstonianum 'blue horizon'
Want the same look without the risk? These plants are listed as non-toxic to cats and dogs by the ASPCA and have similar care needs:
- Hoya — non-toxic to cats and dogs (care guide)
- Bromeliad — non-toxic to cats and dogs (care guide)
- Christmas cactus — non-toxic to cats and dogs (care guide)
- African violet — non-toxic to cats and dogs (care guide)
Ageratum houstonianum 'Blue Horizon' and pets — frequently asked questions
Is ageratum houstonianum 'blue horizon' toxic to cats?
Ageratum houstonianum 'Blue Horizon' (Ageratum houstonianum 'Blue Horizon') is toxic to cats according to the ASPCA. Ageratum houstonianum is not on the ASPCA list, but it contains pyrrolizidine-type alkaloids and coumarin compounds and is generally regarded as toxic if ingested. Treat it as toxic to pets and people; ingestion can cause digestive upset and, with chronic exposure, potential liver harm. Verify with a vet if ingestion is suspected. Keep it out of reach and contact your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 if your cat chews it.
Is ageratum houstonianum 'blue horizon' toxic to dogs?
Per the ASPCA, Ageratum houstonianum 'Blue Horizon' (Ageratum houstonianum 'Blue Horizon') is toxic to dogs. Dogs often chew more enthusiastically than cats, so a toxic plant like ageratum houstonianum 'blue horizon' is best removed from the floor and low shelves entirely.
What happens if my pet eats ageratum houstonianum 'blue horizon'?
Ageratum houstonianum is not on the ASPCA list, but it contains pyrrolizidine-type alkaloids and coumarin compounds and is generally regarded as toxic if ingested. Treat it as toxic to pets and people; ingestion can cause digestive upset and, with chronic exposure, potential liver harm. Verify with a vet if ingestion is suspected. Signs usually appear soon after chewing rather than hours later. If you see drooling, pawing at the mouth, head-shaking, vomiting, loss of appetite, or unusual lethargy after your pet has had access to ageratum houstonianum 'blue horizon', treat it as a suspected ingestion and act on the steps below.
What should I do if my cat or dog ate ageratum houstonianum 'blue horizon'?
Stay calm. Remove any remaining plant material from your pet's mouth and take the plant away so they cannot eat more. Note roughly how much was eaten and when. Do not make your pet vomit unless a vet or poison-control specialist tells you to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice. Bringing a photo or a leaf of ageratum houstonianum 'blue horizon' to the appointment helps the vet treat it correctly.
What are pet-safe alternatives to ageratum houstonianum 'blue horizon'?
If you want a similar look without the risk, good non-toxic swaps include hoya, bromeliad, christmas cactus, african violet. All of these are listed as non-toxic to cats and dogs by the ASPCA, so they suit a home where pets have access to your plants.
Full ageratum houstonianum 'blue horizon' care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete ageratum houstonianum 'blue horizon' care guide, or browse the full pet-safe plant library to check another plant before you buy it.