Summer is a season of blooming gardens, bright colors, and long days spent outdoors. For many dog owners, it’s the perfect time to enjoy nature with their four-legged companions. But while your pup may love exploring your backyard or local park, it’s crucial to be aware of common summer flowers that could be dangerous—or even deadly—to dogs.
Here’s a guide to popular summer blooms that are toxic to dogs, how to recognize signs of poisoning, and tips to keep your furry friend safe.
1. Lilies (Lilium and Hemerocallis species)
While many people associate lily toxicity with cats, some types of lilies can also cause harm to dogs. Daylilies, Easter lilies, and tiger lilies can cause gastrointestinal upset in dogs, including vomiting, diarrhea, and drooling. In large amounts, they may affect kidney function.
Note: True lilies are far more dangerous to cats than dogs, but it's still wise to avoid them if you have pets.
2. Oleander
Oleander is a stunning flowering shrub that thrives in hot climates. Unfortunately, all parts of the plant are highly toxic to dogs (and humans). Ingesting even a small amount can cause:
- Heart abnormalities
- Vomiting
- Diarrhea
- Tremors
- Death in severe cases
3. Azaleas and Rhododendrons
These popular landscaping plants bloom in spring and summer, but they contain grayanotoxins, which can lead to serious health issues in dogs:
- Drooling
- Diarrhea
- Weakness
- Coma
- Potentially fatal heart issues
4. Hydrangeas
Hydrangeas add beautiful blues, pinks, and purples to summer gardens, but they contain cyanogenic glycosides, which can be dangerous if consumed by your dog. Symptoms of hydrangea poisoning include:
- Vomiting
- Lethargy
- Diarrhea
- Depression
5. Daffodils
Though they bloom earlier in the year, daffodils may still be present in gardens well into summer. Dogs are especially at risk if they dig up bulbs. Ingestion can lead to:
- Severe vomiting
- Abdominal pain
- Heart arrhythmias
- Convulsions
6. Foxglove
Foxglove is a tall, elegant flower that adds drama to any garden—but it’s extremely toxic to dogs. It contains cardiac glycosides that interfere with heart function. Symptoms include:
- Drooling
- Nausea
- Irregular heartbeat
- Collapse or death in extreme cases
7. Chrysanthemums
A classic choice for late summer and fall, chrysanthemums contain pyrethrins, which are also used in some pesticides. If your dog nibbles on them, they may experience:
- Drooling
- Vomiting
- Diarrhea
- Incoordination
Signs Your Dog May Have Ingested a Toxic Plant
Keep an eye out for these common symptoms of plant poisoning:
- Excessive drooling
- Vomiting or diarrhea
- Loss of appetite
- Weakness or lethargy
- Seizures or tremors
- Irregular heartbeat
If you notice any of these symptoms and suspect your dog may have eaten a toxic plant, contact your veterinarian or an emergency animal clinic immediately. You can also call the ASPCA Animal Poison Control Center at (888) 426-4435.
How to Keep Your Dog Safe
- Know your plants: Before you plant a garden or let your dog roam, identify all plants and flowers. Look them up to check for toxicity.
- Train your dog: Use commands like “leave it” to prevent curious sniffing or nibbling.
- Create dog-friendly spaces: Fence off flower beds and provide a safe, chew-friendly area for your pet.
- Keep your vet’s number handy: Time is crucial in a poisoning emergency.
Final Thoughts
Summer should be a time of joy and adventure for you and your pup. With a little awareness and planning, you can enjoy the beauty of blooming flowers without putting your dog at risk. When in doubt, opt for pet-safe plants and flowers—and always supervise your dog around the garden.
Stay safe, and happy gardening!
