Handle an unknown plant carefully. Get expert help for exposure.

How plants can harm people

Serious plant poisoning is uncommon. The RHS says the risk of severe poisoning from garden plants is generally low. Still, a few common plants can cause severe illness, and children are most at risk because they put things in their mouths. Plants harm people in three main ways.

The reaction to sap and sunlight is called phytophotodermatitis. Chemicals in the sap make the skin very sensitive to ultraviolet light. Rue (Ruta) is a common herb in Mediterranean gardens, and its sap can cause this reaction in summer sun.

First, prevent more contact

Keep children and pets away from the plant. Do not taste an unknown leaf, berry, seed, or root to identify it. If you must move the plant, wear gloves and avoid touching your face or eyes. Wash your hands and any exposed skin with soap and running water after handling it.

For outdoor brush that may include poison ivy, oak, or sumac, cover skin and wash clothing and tools after work. Do not burn that brush: smoke from these plants can cause serious breathing problems. Ask your local waste or extension service how to dispose of a particular plant.

If a person may have been exposed

1. Call for the right help: In the United States, call Poison Control at 1-800-222-1222 or use poison.org. Elsewhere, contact your local poison center or emergency service. Call emergency services immediately if the person has trouble breathing, collapses, has a seizure, or cannot be awakened.
2. Do not induce vomiting: Do not give a home treatment based on an app result. A poison specialist can give instructions for the specific plant, amount, symptoms, and person.
3. Describe the exposure: Note what part was touched or swallowed, the time, the likely amount, and any symptoms. A clear photo or a safely collected sample may help a specialist, but do not delay the call to obtain one.

If plant material is on the skin, rinse and wash it. For material in an eye, rinse the eye with running water and contact a poison center for further instructions. Advice for ingestion, eye exposure, and skin exposure differs; follow the specialist’s directions rather than a single generic remedy.

In the United Kingdom, call NHS 111 if you are not sure whether a plant is harmful. In Lebanon and many other countries, ask your doctor or the nearest hospital emergency department. Save the right number in your phone today, before you need it.

First aid for skin and eyes

Speed matters most with sap on the skin or in the eye. These steps follow the first aid advice of Poison Control in the United States.

Sap or plant juice on the skin

1. Remove clothing that touched the plant. Put it aside where no one will touch it.
2. Rinse the skin with plenty of room-temperature running water for at least 15 minutes.
3. Use mild soap to remove sticky sap. Clean under the fingernails.
4. Wash the clothing in a full cycle with warm water and detergent.
5. Call a poison center for advice after the rinse.

See a doctor quickly if blisters, pain, redness, or swelling get worse. After contact with rue, giant hogweed, or a plant you cannot name, keep the skin covered from sunlight while you get advice.

Sap in the eye

1. Remove contact lenses.
2. Rinse the eye with gently running room-temperature water for 15 to 20 minutes. Ask the person to blink.
3. Call a poison center after rinsing.

Go to an emergency department straight away if pain or blurred vision is severe. Get an urgent eye examination if pain, redness, or tearing continues one hour after you started rinsing.

What not to do

• Do not make the person sick. Vomiting can cause choking. Syrup of ipecac is no longer recommended.
• Do not give food or drink unless the poison center tells you to.
• Do not wait for symptoms. The NHS warns that symptoms of poisoning can take hours or days to start.
• Do not trust a home remedy from a forum, a relative, or an app. Treatment depends on the plant, the dose, and the person.
• Do not drive yourself to hospital if you feel unwell. Ask someone else to drive, or call an ambulance.

What the poison center will ask

The specialist needs facts to give safe advice. Keep this list near the phone, and answer as clearly as you can. Say “I don’t know” rather than guess.

• The person’s age and approximate weight.
• The plant’s name, if you know it, or a description of its leaves, flowers, and berries.
• Which part of the plant was involved: leaf, berry, seed, root, bulb, or sap.
• How much the person swallowed. For example, “two berries” or “one bite of a leaf”.
• When the exposure happened.
• Any symptoms so far, and any first aid you already gave.
• Your phone number, in case the call drops.

Keep the plant label when you buy a plant. A label with the Latin name lets a specialist find the right information in seconds.

If a pet may have been exposed

Move the pet away from the plant and call a veterinarian or animal poison service promptly, even if the pet looks normal. In the United States, the ASPCA Animal Poison Control Center can be reached at (888) 426-4435; a consultation fee may apply. For breathing difficulty, seizures, collapse, or severe distress, seek emergency veterinary care immediately.

Tell the veterinarian what plant may be involved, which part was eaten, when it happened, and the pet’s species and size. Do not induce vomiting or give milk, oils, medicines, or another home remedy unless a veterinary professional directs you to do so.

Cats need special care around lilies. To learn why, and to find safer plant choices, read the guide to toxic plants for cats and dogs.

Three real situations

A toddler chews a berry from a hedge

You see red juice on the child’s lips and cannot name the shrub. Remove any pieces left in the mouth and wipe the lips. Call a poison center now, even if the child seems fine. Take a clear photo of the shrub and its berries while you wait, but do not delay the call to do it.

Spurge sap in a gardener’s eye

You cut back a spurge (Euphorbia) and milky sap splashes into one eye. Go straight to a tap or shower and rinse for 15 to 20 minutes. Then call a poison center. Spurge sap can injure the eye, so get an eye examination if the pain or blurred vision continues.

Blisters after weeding rue in summer

You pull rue on a sunny July afternoon with bare arms. The next day, your forearms show red streaks and blisters. This pattern fits a sap and sunlight reaction. Keep the skin out of the sun and see a doctor. The dark marks can last for months.

Make your home and garden safer

• Learn the names of the plants you grow. Keep the labels, or photograph them.
• Teach children not to put plants, berries, or seeds in their mouths.
• Wear gloves and long sleeves when you prune or weed.
• Do not leave prunings or uprooted plants where children, pets, or farm animals can reach them.
• Check the plant label for a toxicity warning before you buy.
• Save your poison center, doctor, and veterinarian numbers in your phone.

In hot, dry Mediterranean summers, gardeners prune more and spend more time outside with bare skin. That raises the risk of sap reactions. Oleander (Nerium oleander) is planted widely along roads and in gardens across the region. All parts are toxic if swallowed, and smoke from burning it is harmful. Bag oleander prunings instead of burning them.

When to get expert help

Use identification results with care

An identification service can return similar-looking species and may miss a toxic plant. A missing toxicity warning in a result does not establish safety. Check a qualified local source before eating a wild plant, using a plant as medicine, or allowing a pet to chew it. Where possible, compare flowers, leaves, stems, and growing location rather than relying on one photo.

For ordinary gardening, protective clothing, handwashing, and keeping unknown plants away from children and pets are sensible precautions. The right response after an actual exposure depends on the person or animal and the plant; expert advice takes priority over this guide.

Before you forage, read the guide to wild plant lookalikes. It explains why a photo cannot prove that a wild plant is safe to eat.