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Are Split-Leaf Philodendrons Poisonous to Humans?

Originally from the tropical regions of Mexico and Guatemala, the split leaf philodendron (Monstera deliciosa) has become a popular houseplant, and an outdoor landscape plant within its U.S. Department of Agriculture plant hardiness zones of 10 through 11. The large, glossy leaves form deep splits and holes as the plant ages. Young leaves are heart-shaped and lack the characteristic splitting. They are evergreen climbers and cling to stakes and other trees with aerial roots. While beautiful, all parts but the ripe fruits are toxic to humans and pets alike.
  1. Toxic Vs. Non-Toxic Parts

    • The leaves, stems, roots, trunk, aerial roots and unripe fruits of the split-leaf philodendron are toxic, but usually only in large doses. They contain oxalic acids, a substance found in many plants that often give them a sour taste. However, the ripe fruit is edible and considered tasty. The flower has a white cup-like petal and central protrusion called a spadix. The 8- to 12-inch mature spadices (fruits) are said to taste like a combination of banana, pineapple and mango. While not considered toxic, sensitive people may still suffer symptoms after eating the fruits.

    Symptoms of Poisoning

    • Exposure to the juices of the split-leaf philodendron can have both internal and external effects. Externally, the juice may cause skin irritation, burning or blistering. Often, however, skin irritation lasts only a few minutes. When taken internally, pain or burns in the mouth and throat may occur. Other symptoms include nausea, vomiting, diarrhea, weakness and difficulty breathing. In severe cases convulsions, coma and death may rarely occur. Severity of symptoms may depend on the sensitivity of the victim.

    What to Do If You've Eaten Split-Leaf Philodendron

    • If you or someone you know has eaten split-leaf philodendron, call your doctor or the local poison control center at 1-800-222-1222. If symptoms are severe, call 911. Provide them with your or the victim's age, weight and condition, the name of the plant, the time it was swallowed and the amount swallowed. They will respond to the emergency and offer advice on what to do next. Advice given for oxalic poisoning from any source may include giving the victim milk or water, unless instructed by the health professional not to do so or unless the victim is vomiting or finds it hard to breathe or swallow.

    Other Species Affected

    • Humans aren't the only beings that may be affected by poisoning from split-leaf philodendrons. Pets, such as dogs and cats, may also suffer symptoms if they eat split-leaf philodendrons. They may experience symptoms similar to humans, such as irritation and burning around the mouth, tongue and lips, vomiting, difficulty swallowing and other symptoms. Flush your pet's mouth with water and feed milk-based products such as yogurt, milk or cheese. Call your veterinarian immediately.