String of Hearts Toxic to Cats? Finally, a Pet-Safe Trailing Plant!

Here’s some genuinely great news: string of hearts toxic to cats is NOT a concern because this plant is completely non-toxic to cats and dogs! If you’re a plant-loving pet owner who’s frustrated by how many gorgeous trailing plants are poisonous (looking at you, pothos and philodendron), string of hearts (Ceropegia woodii) is about to become your new best friend.

We can’t tell you how refreshing it is to recommend a truly pet-safe trailing plant that’s also beautiful and relatively easy to grow. Most trailing houseplants with dramatic foliage contain calcium oxalate crystals or other toxins, but string of hearts is genuinely safe. You can grow it in hanging baskets, on shelves, or trailing from furniture without worrying about your curious cat taking a nibble.

In this guide, we’ll explain why string of hearts is safe for pets, how it compares to toxic trailing plants, display ideas that take advantage of the pet-safety, and other pet-friendly alternatives if you’re building an entirely non-toxic plant collection.

For complete plant care information, see our string of hearts care guide.

Is String of Hearts Toxic to Cats and Dogs?

No! String of hearts is non-toxic to both cats and dogs, and also safe for humans.

Why String of Hearts is Safe

Unlike most Tradescantia family plants (wandering jew, purple heart), string of hearts doesn’t contain calcium oxalate crystals or other toxic compounds. The plant is in the Apocynaceae family, not the Commelinaceae family like other common trailing houseplants.

This means if your cat or dog nibbles on a vine, they won’t experience the mouth irritation, drooling, or vomiting that occurs with toxic plants. The worst that might happen is minor digestive upset from eating plant material (which isn’t meant to be food), but this is rare.

Official Safety Confirmation

String of hearts (Ceropegia woodii) is listed as non-toxic by the ASPCA (American Society for the Prevention of Cruelty to Animals) and other pet poison databases. It’s safe to grow in homes with cats, dogs, rabbits, and other pets.

Advantages of Pet-Safe Plants

Having a pet-safe trailing plant opens up new display possibilities.

No Placement Restrictions

Because string of hearts toxic to cats isn’t a concern, you can:

• Place on low shelves or furniture where pets can reach
• Grow in hanging baskets at any height
• Display on the floor in decorative pots
• Let vines trail freely without worry
• Keep in rooms with pet access

Peace of Mind

You don’t need to constantly monitor your pets around the plant or worry about emergency vet visits if you catch them nibbling. This peace of mind is genuinely valuable for pet owners who also love plants.

Educational Opportunity

Pet-safe plants can be used to teach cats and dogs appropriate plant interaction without the risk of poisoning. Use string of hearts as a “training plant” before introducing any toxic varieties with proper barriers.

Comparing to Toxic Trailing Plants

Understanding which similar plants ARE toxic helps you make safe choices.

Toxic Trailing Plants to Avoid (If You Have Pets)

Pothos (all varieties): Mildly toxic with calcium oxalate crystals. Causes mouth irritation, drooling, vomiting.

Philodendron (all species): Mildly to moderately toxic with calcium oxalate. Similar symptoms to pothos.

Wandering Jew (Tradescantia zebrina): Mildly toxic. For details, see our wandering jew toxic to cats guide.

Purple Heart (Tradescantia pallida): Mildly toxic. See our purple heart toxic to cats guide.

English Ivy: Toxic, can cause vomiting, diarrhea, and respiratory issues.

Why String of Hearts is the Better Choice

String of hearts offers similar trailing beauty to these toxic plants but without any safety concerns. The delicate heart-shaped leaves create an equally dramatic display without the worry.

Other Pet-Safe Trailing Plants

If you’re building an entirely pet-safe collection, these trailing plants are also safe.

Pet-Safe Trailing Options

Spider Plant (Chlorophytum comosum): Completely safe with variegated green-and-white foliage. Produces trailing baby plants. Very easy to grow.

Boston Fern: Lush, cascading fronds that are safe for pets. Prefers higher humidity but tolerates average household conditions.

Peperomia varieties: Many Peperomia species have trailing habits and are non-toxic. Look for Peperomia prostrata (String of Turtles) or trailing varieties.

Christmas Cactus: Safe for pets with cascading stems and colorful blooms. Easy to grow and propagate.

What If My Pet Eats String of Hearts Anyway?

Even though it’s non-toxic, eating large amounts of plant material can cause mild digestive upset.

Expected Effects

If a pet eats string of hearts, they might experience:

• Mild stomach discomfort
• Possible vomiting (from eating non-food items, not toxicity)
• Mild diarrhea

These symptoms should be very mild and resolve within 24 hours. This is similar to if your pet ate grass or other non-toxic plant material.

When to Contact Your Vet

Contact your vet if:

• Symptoms are severe or persistent beyond 24 hours
• Your pet shows signs of distress
• You’re unsure about what the pet ate (to confirm it was string of hearts and not another plant)

Frequently Asked Questions

Finding out that string of hearts toxic to cats is a non-issue is genuinely exciting for pet owners. Finally, a gorgeous trailing plant with delicate, romantic foliage that you can grow without constant worry about your curious pets! This pet-safety combined with relatively easy care and unique propagation methods makes string of hearts one of the absolute best choices for plant-loving pet households.

Remember that while string of hearts is safe, you still want to discourage pets from eating large amounts of any plant material. Provide appropriate cat grass or chew toys as alternatives, and use positive reinforcement to encourage pets to leave plants alone. But unlike with toxic plants, if your cat does take a nibble of string of hearts, you can relax knowing there’s no danger—just the minor annoyance of chewed leaves.

Related Care Guides

• String of Hearts Care: Complete Guide – Master all aspects of care
• String of Hearts Propagation – Multiply your safe plants
• Wandering Jew Toxic to Cats – Compare with toxic relative
• Purple Heart Toxic to Cats – Another toxic Tradescantia

Expert Resources & Further Reading

• ASPCA: Toxic and Non-Toxic Plants Database – Official pet safety database
• Pet Poison Helpline – Emergency toxicity hotline