10 Houseplants With a Toxic Surprise: A Warning for Gardeners

If you're a fan of greenery and want to adorn your home with beautiful plants, it's essential to be aware of the potential dangers lurking in some decorative plants. Some ornamental plants can be toxic, and it's crucial to know which ones to avoid to stay safe. Below is a list of ten toxic ornamental plants that you should be cautious about before bringing them into your home or garden. Learn about these plants and stay informed to avoid any potential harm!

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Ornamental plants are not only used for home decoration but also for air purification and are believed to bring good luck and fortune. However, not many people are aware that some plant species contain toxic substances that can cause poisoning and even lead to death if accidentally chewed. Let’s explore this issue in more detail to be cautious when planting any ornamental plants.

1Oleander

With the scientific name Nerium oleander, belonging to the Apocynaceae family, this plant’s sap is creamy, turning from ivory to greenish. If accidentally touched or ingested, it can cause vomiting, extreme fatigue, headaches, dizziness, and loss of strength.

More severe consequences include low blood pressure, cardiac arrhythmia, deep coma, and even death if not treated promptly.

Oleander’s sap induces vomiting, extreme fatigue, headaches, and dizziness

Therefore, it is not recommended to plant oleander near water sources such as wells or reservoirs because its falling leaves and flowers can contaminate the water.

2Jatropha

Jatropha, with the scientific name Jatropha podagrica, is also known as water hyacinth, mountain lotus, or oil-bearing plant with a bulb. Its bark and leaves, when used appropriately, can cure hair loss, mouth ulcers, and skin diseases.

However, the plant’s stem, bulb, and seeds contain the toxic substance Curcin, which causes a burning sensation in the throat, vomiting, diarrhea, and abdominal pain. If ingested in larger quantities, it can lead to cardiac and circulatory disturbances and central nervous system depression.

Jatropha contains Curcin, inducing throat irritation, vomiting, diarrhea, and abdominal pain

In case of poisoning, it is crucial to administer fluid therapy and gastric lavage to eliminate the toxins from the body and replenish lost fluids due to electrolyte imbalances, diarrhea, and vomiting.

3Dumb Cane

Scientifically known as Dieffenbachia Amoena, this plant is easy to grow and has an attractive appearance, making it a popular choice for indoor ornamental plants.

All parts of the plant, from root to tip, contain toxins. The plant’s sap contains andromedotoxin and arbutin glucoside, which cause tongue numbness, tongue redness, and a burning sensation if chewed or swallowed, and may lead to an inability to speak due to throat stiffness.

Dumb Cane contains andromedotoxin and arbutin glucoside

If you accidentally come into contact with the plant’s sap, it is advisable to neutralize it by applying heat, such as by using a hairdryer or rinsing with warm water.

4Crown of Thorns

Also known as the flower of eight fairies or the flower of thorns, this plant’s scientific name is Euphorbia milii splendens. It can grow in low-light conditions, has beautiful flowers, and is easy to cultivate, making it a popular choice for many.

The plant’s stem is covered with sharp thorns that can easily pierce and scratch the skin if not handled carefully. Its milky-white sap, when in contact, can cause a burning sensation and, if ingested, can impair the immune system and lead to blindness or reduced vision if it gets into the eyes.

Crown of Thorns’ sap can cause blindness or reduced vision if it gets into the eyes

5Hyacinth

Hyacinth, also known as night-blooming jessamine, has the scientific name Hyacinth orientalis. Its fragrant and colorful flowers bloom at night, attracting many gardeners.

However, its bulbs contain high levels of the toxic substance Alkaloid, which can cause muscle spasms and digestive issues such as bloating, nausea, and diarrhea if ingested.

Hyacinth bulbs contain toxic Alkaloids

6Burro’s Tail

Burro’s Tail, also known as string of pearls, has the scientific name Sedum morganianum. It is often grown indoors in pots to purify the air.

Despite its benefits, this plant contains the toxic substance glucoside, which, if ingested, can lead to fatigue, diarrhea, respiratory problems, shortness of breath, and increased heart rate.

Burro’s Tail contains toxic glucosides

7Rhododendron

With the scientific name Rhododendron occidentale, rhododendron boasts colorful and vibrant flowers. When used appropriately, it can help reduce pain, lower heart rate, and decrease blood pressure.

However, this plant contains the dangerous toxins Andromedotoxin and Arbutin glucoside. If ingested, these toxins can cause excessive salivation, vomiting, dizziness, ringing in the ears, and difficulty breathing. Even a small amount of its leaves can lead to severe poisoning in children.

Rhododendron contains dangerous toxins Andromedotoxin and Arbutin glucoside

8Pothos

Belonging to the Araceae family, pothos can thrive in both soil and water environments and is commonly grown indoors for air purification.

However, its leaves, stems, and especially petioles contain the toxic substance Calcium Oxalate, which can cause a burning sensation in the mouth, throat, and intestines if chewed. More severe consequences include coma, anaphylactic shock, and even death.

Pothos contains Calcium Oxalate, leading to mouth and throat irritation

9Allamanda

Also known as golden trumpet, this plant has yellow flowers and a climbing habit, making it ideal for creating fences.

All parts of the plant, including its stem, bark, flowers, leaves, seeds, and sap, contain toxins that can affect the digestive system, causing abdominal pain, diarrhea, vomiting, and symptoms such as lip swelling and dizziness.

Allamanda contains toxins affecting the digestive system

10Sago Palm

With the scientific name Cycas revoluta Thunb, this plant’s stem contains Alkaloids, which are potentially carcinogenic, and its seeds contain Cycasin, which is toxic to children.

Sago Palm contains potentially carcinogenic Alkaloids

These are the top ten ornamental plants with toxic properties that can be harmful if touched or ingested. Therefore, it is essential to be cautious and well-informed before planting any of these species to avoid adverse health effects.

Frequently asked questions

There are several common houseplants that contain toxic substances that can be harmful to both humans and pets if ingested. These include Dieffenbachia, Caladium, Peace Lily, Sago Palm, Oleander, Azalea, Cyclamen, Lilies (especially Daylilies), Elephant’s Ear, and Chinese Evergreen.

Symptoms of poisoning vary depending on the plant and the amount ingested. In humans, it can cause mouth and throat irritation, vomiting, diarrhea, and in severe cases, difficulty swallowing and breathing. For pets, especially cats and dogs, symptoms can include drooling, vomiting, diarrhea, and in severe cases, seizures and even death.

The best way to prevent accidental poisoning is to be aware of the plants you have in your home and their potential toxicity. Keep these plants out of reach of children and pets, and consider using hanging baskets or placing them in rooms that are off-limits to pets. Also, wash your hands after handling these plants, and ensure that children do not put their hands in their mouths after touching them.

Yes, there are non-toxic alternatives that resemble some of the toxic plants mentioned. For example, instead of Dieffenbachia or Caladium, you can opt for Calathea or Maranta, which have similar-looking leaves but are non-toxic. Spider plants or Boston ferns are safe alternatives to the Peace Lily.

If you suspect that someone has ingested parts of these toxic plants, immediately call your local poison control center or seek medical attention. For pets, contact your veterinarian right away. Quick action can prevent serious complications.
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