Pet safety
Is Mizuna 'Red Kingdom'toxic to cats & dogs?
Brassica rapa var. nipposinica 'Red Kingdom'
Quick verdict — at a glance
- Toxic to cats?
- Yes — mildly
- Toxic to dogs?
- Yes — mildly
- ASPCA classification
- Mildly toxic to pets · botanical name Brassica rapa var. nipposinica 'Red Kingdom'
Is mizuna 'red kingdom' safe for cats and dogs?
Mildly. The ASPCA flags mizuna 'red kingdom' as mildly toxic to cats and dogs — a chewing pet gets oral irritation and drooling rather than a medical emergency, but it is still worth a high shelf. 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. Brassica rapa mustard greens are not individually listed on the ASPCA toxic plant database, so a pet-safe label cannot be asserted; treat with caution and verify with a vet. Brassicas contain isothiocyanates and goitrogens, and large quantities can cause gas, GI upset, or thyroid effects in pets, so feed only in small amounts.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | Yes (mild) | Mildly toxic to pets |
| Dogs | Yes (mild) | Mildly toxic to pets |
What happens if a pet eats mizuna 'red kingdom'?
Brassica rapa mustard greens are not individually listed on the ASPCA toxic plant database, so a pet-safe label cannot be asserted; treat with caution and verify with a vet. Brassicas contain isothiocyanates and goitrogens, and large quantities can cause gas, GI upset, or thyroid effects in pets, so feed only in small amounts. 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 mizuna 'red kingdom', treat it as a suspected ingestion and act on the steps below.
What to do if your pet ate mizuna 'red kingdom'
- Remove any plant material from your pet's mouth and move mizuna 'red kingdom' 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 mizuna 'red kingdom' 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 mizuna 'red kingdom'
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:
- Cucumber — non-toxic to cats and dogs (care guide)
- Lettuce — non-toxic to cats and dogs (care guide)
- Bean — non-toxic to cats and dogs (care guide)
- Pea — non-toxic to cats and dogs (care guide)
Mizuna 'Red Kingdom' and pets — frequently asked questions
Is mizuna 'red kingdom' toxic to cats?
Mizuna 'Red Kingdom' (Brassica rapa var. nipposinica 'Red Kingdom') is mildly toxic to cats according to the ASPCA. Brassica rapa mustard greens are not individually listed on the ASPCA toxic plant database, so a pet-safe label cannot be asserted; treat with caution and verify with a vet. Brassicas contain isothiocyanates and goitrogens, and large quantities can cause gas, GI upset, or thyroid effects in pets, so feed only in small amounts. 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 mizuna 'red kingdom' toxic to dogs?
Per the ASPCA, Mizuna 'Red Kingdom' (Brassica rapa var. nipposinica 'Red Kingdom') is mildly toxic to dogs. Dogs often chew more enthusiastically than cats, so a toxic plant like mizuna 'red kingdom' is best removed from the floor and low shelves entirely.
What happens if my pet eats mizuna 'red kingdom'?
Brassica rapa mustard greens are not individually listed on the ASPCA toxic plant database, so a pet-safe label cannot be asserted; treat with caution and verify with a vet. Brassicas contain isothiocyanates and goitrogens, and large quantities can cause gas, GI upset, or thyroid effects in pets, so feed only in small amounts. 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 mizuna 'red kingdom', treat it as a suspected ingestion and act on the steps below.
What should I do if my cat or dog ate mizuna 'red kingdom'?
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 mizuna 'red kingdom' to the appointment helps the vet treat it correctly.
What are pet-safe alternatives to mizuna 'red kingdom'?
If you want a similar look without the risk, good non-toxic swaps include cucumber, lettuce, bean, pea. 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 mizuna 'red kingdom' care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete mizuna 'red kingdom' care guide, or browse the full pet-safe plant library to check another plant before you buy it.