Pet safety
Is Spencer Mixed sweet peatoxic to cats & dogs?
Lathyrus odoratus 'Spencer Mixed'
Quick verdict — at a glance
- Toxic to cats?
- Yes — mildly
- Toxic to dogs?
- Yes — mildly
- ASPCA classification
- Mildly toxic to pets · botanical name Lathyrus odoratus 'Spencer Mixed'
Is spencer mixed sweet pea safe for cats and dogs?
Not entirely — spencer mixed sweet pea is mildly toxic to cats and dogs. It rarely causes serious harm, but chewing it triggers real discomfort, so keep it out of a pet's reach. 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. The ASPCA lists sweet pea (Lathyrus) as toxic to horses; for dogs and cats the primary concern relates to the toxic aminopropionitrile in seeds and pods. Seeds and unripe pods contain lathyrogenic compounds that in large quantities cause lathyrism (neurological weakness, paralysis). The flowers are not considered significantly hazardous but the seeds and pods must never be consumed. Wear gloves when handling and keep seed packets away from children and pets. RHS also advises against eating pods or seeds.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | Yes (mild) | Mildly toxic to pets |
| Dogs | Yes (mild) | Mildly toxic to pets |
What happens if a pet eats spencer mixed sweet pea?
The ASPCA lists sweet pea (Lathyrus) as toxic to horses; for dogs and cats the primary concern relates to the toxic aminopropionitrile in seeds and pods. Seeds and unripe pods contain lathyrogenic compounds that in large quantities cause lathyrism (neurological weakness, paralysis). The flowers are not considered significantly hazardous but the seeds and pods must never be consumed. Wear gloves when handling and keep seed packets away from children and pets. RHS also advises against eating pods or seeds. 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 spencer mixed sweet pea, treat it as a suspected ingestion and act on the steps below.
What to do if your pet ate spencer mixed sweet pea
- Remove any plant material from your pet's mouth and move spencer mixed sweet pea 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 spencer mixed sweet pea 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 spencer mixed sweet pea
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)
Spencer Mixed sweet pea and pets — frequently asked questions
Is spencer mixed sweet pea toxic to cats?
Spencer Mixed sweet pea (Lathyrus odoratus 'Spencer Mixed') is mildly toxic to cats according to the ASPCA. The ASPCA lists sweet pea (Lathyrus) as toxic to horses; for dogs and cats the primary concern relates to the toxic aminopropionitrile in seeds and pods. Seeds and unripe pods contain lathyrogenic compounds that in large quantities cause lathyrism (neurological weakness, paralysis). The flowers are not considered significantly hazardous but the seeds and pods must never be consumed. Wear gloves when handling and keep seed packets away from children and pets. RHS also advises against eating pods or seeds. 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 spencer mixed sweet pea toxic to dogs?
Per the ASPCA, Spencer Mixed sweet pea (Lathyrus odoratus 'Spencer Mixed') is mildly toxic to dogs. Dogs often chew more enthusiastically than cats, so a toxic plant like spencer mixed sweet pea is best removed from the floor and low shelves entirely.
What happens if my pet eats spencer mixed sweet pea?
The ASPCA lists sweet pea (Lathyrus) as toxic to horses; for dogs and cats the primary concern relates to the toxic aminopropionitrile in seeds and pods. Seeds and unripe pods contain lathyrogenic compounds that in large quantities cause lathyrism (neurological weakness, paralysis). The flowers are not considered significantly hazardous but the seeds and pods must never be consumed. Wear gloves when handling and keep seed packets away from children and pets. RHS also advises against eating pods or seeds. 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 spencer mixed sweet pea, treat it as a suspected ingestion and act on the steps below.
What should I do if my cat or dog ate spencer mixed sweet pea?
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 spencer mixed sweet pea to the appointment helps the vet treat it correctly.
What are pet-safe alternatives to spencer mixed sweet pea?
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 spencer mixed sweet pea care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete spencer mixed sweet pea care guide, or browse the full pet-safe plant library to check another plant before you buy it.