Toxic Plants for Pets in Florida: What’s Growing in Your St. Petersburg Yard Could Be Dangerous

Florida’s year-round growing season means lush, beautiful yards — but it also means many St. Petersburg homeowners unknowingly have plants that are toxic to dogs and cats growing right outside their door. Some of the most common landscaping plants in Pinellas County can cause anything from mild stomach upset to organ failure in pets.

Knowing which plants pose a threat — and what to do if your pet gets into one — can make the difference between a scare and a serious emergency.

Sago Palms: Florida’s Most Dangerous Yard Plant

Sago palms are everywhere in St. Petersburg landscaping, and they’re one of the most toxic plants your pet can encounter. Every part of the plant is poisonous, but the seeds (the orange-red nuts that form at the base) are especially concentrated with cycasin, a toxin that attacks the liver.

Even a small amount can cause vomiting, bloody stool, jaundice, and liver failure. Without aggressive treatment, sago palm ingestion has a mortality rate as high as 50 percent in dogs. If you have sago palms in your yard and you have pets, the safest choice is removal.

Oleander: Beautiful but Deadly

Oleander is a popular flowering shrub throughout the Tampa Bay area, prized for its drought tolerance and colorful blooms. Unfortunately, all parts of the plant — leaves, flowers, stems, and even the water in a vase holding cut oleander — contain cardiac glycosides that can cause heart arrhythmias, tremors, and death in both dogs and cats.

Symptoms often appear within a few hours and can include drooling, abdominal pain, diarrhea, and an irregular heartbeat. This plant requires immediate veterinary attention if ingested.

Lilies: A Serious Threat to Cats

Many Florida gardeners grow various lily species, and cat owners need to be especially cautious. True lilies — including Easter lilies, tiger lilies, Asiatic lilies, and daylilies — can cause acute kidney failure in cats. Even a small nibble on a leaf or petal, or drinking water from a vase containing lilies, can be fatal without prompt treatment.

Dogs are less susceptible to lily toxicity, but peace lilies and calla lilies can still cause oral irritation and drooling in both dogs and cats.

Dieffenbachia and Philodendron: Common Houseplants with Hidden Risks

These popular indoor plants thrive in Florida’s humidity and are found in many St. Pete homes. Both contain calcium oxalate crystals that cause intense burning and swelling of the mouth, tongue, and throat when chewed. While rarely fatal, the pain and swelling can make it difficult for pets to breathe or swallow, and veterinary care is often needed to manage symptoms.

Coontie and Zamia: Native but Not Safe

Coontie is a native Florida cycad that’s increasingly popular in eco-friendly landscaping throughout Pinellas County. Like its cousin the sago palm, coontie contains cycasin and poses the same liver toxicity risks. Pets that dig or chew on the roots or seeds are at particular risk.

Brunfelsia (Yesterday-Today-and-Tomorrow)

This common Florida ornamental produces flowers that change from purple to lavender to white over three days. The entire plant contains brunfelsamidine, which can cause tremors, seizures, and even death in dogs. It’s particularly dangerous because the berries can be attractive to curious pets.

What to Do If Your Pet Eats a Toxic Plant

Time matters. If you see your pet chewing on or eating any plant you’re unsure about:

• Remove any remaining plant material from your pet’s mouth
• Identify the plant if possible — take a photo or bring a sample with you
• Do not induce vomiting unless specifically instructed by a veterinarian
• Call your vet immediately — at Community Animal Hospitals, reach us at (727) 592-1816
• Note the time of ingestion and approximately how much was eaten

You can also contact the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee applies).

Making Your St. Petersburg Yard Pet-Safe

You don’t have to sacrifice a beautiful yard to keep your pets safe. Many Florida-friendly plants are non-toxic, including:

• Bromeliads — colorful and pet-safe
• Boston ferns — perfect for shaded porches
• Spider plants — hardy indoor option
• Areca palms — a safe alternative to sago palms
• Hibiscus — non-toxic and attracts pollinators

If you’re not sure whether a plant in your yard or home is safe, our veterinary team at Community Animal Hospitals is happy to help you figure it out. Dr. Leslie Block, Dr. Craig Mullenax, and Dr. Mark Williamson regularly see plant toxicity cases and can advise on both treatment and prevention.

A quick yard audit now could save you an emergency visit later. Walk through your property, identify what’s growing, and make swaps where needed. Your pets explore your yard with their mouths — it’s worth making sure everything they can reach is safe.