Is Sparganium erectum toxic to dogs?

Mildly. The ASPCA lists sparganium erectum as mildly toxic to dogs — a chewing dog typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. Sparganium erectum is not individually listed by the ASPCA as toxic or non-toxic; treat with caution and verify with a vet before assuming it is pet-safe. Keep dogs and cats from chewing the foliage or seed heads, which could cause mild gastrointestinal irritation in the absence of confirmed safety data.

Sparganium erectum is not individually listed by the ASPCA as toxic or non-toxic; treat with caution and verify with a vet before assuming it is pet-safe. Keep dogs and cats from chewing the foliage or seed heads, which could cause mild gastrointestinal irritation in the absence of confirmed safety data. 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 sparganium erectum.

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.

The ASPCA classification Growli uses applies to both cats and dogs: Sparganium erectum is mildly toxic to cats as well. See the full sparganium erectum pet-safety guide for both species.

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.