Which Flowers Are Toxic? Keep an Eye on These Common Blooms

When people talk about toxic flowers in everyday life, they generally mean ornamental plants whose whole plant, sap, bulbs, seeds or other parts contain toxic substances. In most cases, their toxicity only takes effect when they are eaten by mistake or when the sap touches a wound; simply keeping them as a display does not cause harm, so there is no need to turn pale at the mention of flowers. Knowing which flowers are toxic is mainly about avoiding the risk of accidental ingestion or contact.

There are quite a few common toxic flowers. Oleander (Nerium oleander) is toxic in all its parts, and the white sap that flows out when branches and leaves are broken should be kept away from the mouth and nose; the sap of the stems and leaves of dumb cane (Dieffenbachia, known in Chinese as dripping Guanyin) is irritating, so extra care is needed when pruning; the bulbs of narcissus and hyacinth are noticeably toxic and must not be mistaken for onions or garlic and eaten; the sap of common houseplants such as pothos, poinsettia and crown of thorns (Euphorbia milii) can cause redness and itching in sensitive people after it touches the skin.

When caring for these plants, a few small habits can noticeably reduce the risk. It is best to wear gloves when pruning or repotting, and to wash your hands promptly afterwards; in households with young children or pets, try to place the flowers out of reach to prevent chewing; varieties with a strong fragrance at night should not be kept for long in a sealed bedroom, and can be moved to a ventilated living room or balcony.

It should be noted that toxic does not mean they cannot be grown; in most cases you simply need to prevent accidental ingestion or contact. If there are pregnant women, infants or family members with an allergic constitution at home, it is safer to learn more about a plant's habits before choosing flowers. If accidental ingestion does occur, take the plant or a clear photo to see a doctor as soon as possible, so the doctor can judge and treat accordingly.