The String of Hearts (Ceropegia woodii) is a popular houseplant celebrated for its long, trailing vines and heart-shaped, silvery-green leaves. Also called the Rosary Vine or Chain of Hearts, this succulent-like species is native to South Africa. For many plant enthusiasts, especially those with pets or small children, the primary concern is the plant’s safety profile. The good news is that the String of Hearts is generally regarded as one of the safer options for indoor greenery.
Safety Status for Humans and Pets
The Ceropegia woodii is widely classified as non-toxic to household pets, including both cats and dogs, and humans. This classification is supported by veterinary toxicology sources, which often list the plant as safe for homes with animals. The plant belongs to the Apocynaceae family, commonly known as the dogbane family, which contains many species with toxic cardiac glycosides, such as the Oleander.
However, the String of Hearts itself lacks these harmful compounds, distinguishing its safety profile from its distant, more dangerous relatives. Unlike common toxic trailing plants like Pothos (Epipremnum aureum) or Philodendron, the String of Hearts does not contain irritating calcium oxalate crystals. These crystals are responsible for oral irritation, drooling, and vomiting associated with the ingestion of many popular houseplants. While the plant is physically safe, there is a minor possibility of mild reactions if consumed in large quantities.
Potential Side Effects and Immediate Action
Consuming any non-food plant material can lead to a gastrointestinal upset. Ingestion by a pet or child may result in minor symptoms such as mild vomiting, diarrhea, or a brief loss of appetite. These symptoms arise from the body’s natural reaction to undigested plant fiber rather than from a toxic chemical agent.
A less common side effect in humans who frequently handle the plant is the development of allergic dermatitis. This mild skin irritation is a possibility for individuals who propagate or prune the plant regularly, coming into contact with the sap. If skin contact occurs, thoroughly wash the affected area with soap and water to minimize any potential reaction.
If a pet or child ingests a large amount of the plant and shows more than mild symptoms, contact a professional immediately. For humans, the National Poison Control Center can provide specific guidance. For animals, the Animal Poison Control Center or a local veterinarian should be contacted promptly. While severe poisoning is not a concern with Ceropegia woodii, professional consultation ensures that the symptoms are correctly managed.
Practical Safety Measures for Plant Owners
Although the String of Hearts is considered safe, owners can take measures to prevent accidental ingestion or unnecessary contact. The plant’s natural cascading habit makes it suited for high placement, such as on tall shelves or in hanging planters. Positioning the plant out of the reach of pets or small children is the most effective way to eliminate the risk of chewing the vines.
When propagating or pruning the plant, which involves snipping stems and releasing sap, it is a good practice to wear gardening gloves. After handling, washing your hands helps remove any residue that might cause mild contact irritation. It is also beneficial to correctly identify your plant, as the String of Hearts is sometimes confused with truly toxic trailing plants, such as the String of Pearls (Senecio rowleyanus).