Originally, this post was titled Nine Deadly Plants: The Good Post for Poisoning Your Enemies. I (David) changed it, as we would hate to have anyone get rid of their problems hurt another human being with these highly useful toxic plants. Also, my daughter has a morbid sense of humor.

Nine Deadly Plants: Do You Have Any of These in YOUR Yard?

Whether a toddler chews oleander leaves, or a mad lover poisons her rival, stories of poisonings are common. These nine deadly plants are some of the most notorious poisoners out there.


Blighia sapida

The pod and seeds of ackee are very poisonous. The arils, when the pod splits open on the tree, are edible. Ackee poisoning is popularly called Jamaican vomiting sickness. According to The American Journal of Tropical Medicine and Hygiene, “Toxicity is dose dependent and usually manifests within 6–48 hours of ingestion with recovery usually within 1 week. Symptoms begin with intense vomiting, followed by a quiescent phase and then subsequently more vomiting, seizures, and coma. In fatal cases, death usually occurs within 48 hours of ingestion. Hypoglycemia and hepatic injury have been found to accompany the clinical manifestations.”

For more information on ackee, visit my article here.

Angel’s Trumpet

Brugmansia candida

Angel’s trumpet is a beautiful flower. But if the leaves or flowers are eaten, disaster strikes. It can cause weakness, constipation, rapid heart rate, depression, hallucinations, death, dilated pupils and blurred vision. Even handling the plant can irritate your eyes.

Castor Bean

Ricinus Communis

Castor bean is an annual shrub with deeply lobed leaves, prickly seedpods and large, speckled seeds. Some varieties have red stems. The plant can reach over ten feet tall in a single growing season. Only the seeds of the castor bean plant are poisonous. Three to four seeds can kill a person.

Deadly Nightshade

Atropa Belladonna

The deadly nightshade is a perennial found in Asia, Europe, and North America. It grows to about three feet tall, and has oval-shaped leaves and purple-brown flowers. It produces berries, which start as green and ripen to red. The entire deadly nightshade plant is poisonous. If you just rub against the plant, it will cause skin irritation. But the alluring deadly berries are the most commonly eaten. The symptoms of poisoning are rapid heartbeat, confusion, hallucinations, seizures and death.


Hippomane Mancinella

Manchineel is a short tree common in the Caribbean and Central America. It produces a highly irritating sap, and it also produces a deadly fruit. The fruit is small and green, and when eaten, causes the mouth and throat to swell closed.


Nerium Oleander

Oleander is a small ornamental shrub. It is popular for its pink, yellow, or white blossoms. Unfortunately, there are many deaths surrounding this beautiful plant. Oleander causes nausea, vomiting, severe weakness, irregular pulse, and a decreased heart rate that leads to death.

Rosary Peas

Abrus Precatorius

The rosary pea is a vine that climbs ten to fifteen feet high. It has pale violet flowers, and produces pods which contain the deadly seeds. Each seed is bright red with one black dot on it. They are so toxic that a single seed, chewed well, would kill a person.

Water Hemlock

Cicuta spp.

Water hemlock is a very dangerous plant. It has umbrella-shaped clusters of white flowers and lacy foliage. Most people think the root is edible, which makes it is responsible for many deaths. It only takes a nibble or two to get a lethal dose of toxin.

Don’t confuse it with elderberry!


Taxus Baccata

The yew is a slow growing evergreen that can live two to three centuries. Every part of the yew is poisonous with the exception of the flesh of its berrylike fruit, that even contains a poisonous fruit. Eating just a few seeds or leaves with bring on gastrointestinal symptoms, a dangerous drop in pulse rate, and possible heart failure.

A lot of the information on this article can be found in Amy Stewart’s very entertaining book “Wicked Plants.”

You can buy her book here.

All of the plant illustrations in this post were hand drawn by Daisy The Good.

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