Is Night-Blooming Jessamine Poisonous? – Cestrum Toxicity Guide

Night-blooming jessamine is highly toxic to dogs, cats, and humans. All parts of the plant contain alkaloids that affect the gastrointestinal tract, heart, and nervous system. California Poison Control classifies it at their highest danger rating for vegetation. Despite its pleasant nocturnal fragrance, this is not a safe plant to have in a household with pets or young children.

What Is Night-Blooming Jessamine?

Night-blooming jessamine is the common name for Cestrum nocturnum, a tropical shrub in the Solanaceae family (the nightshade family). It is native to the Caribbean and Central America and is widely cultivated in warm climates for its intensely fragrant white or greenish-white tubular flowers, which open at night. In warm regions it grows as a large shrub or small tree. In cooler climates it is grown indoors or as a container plant.

The plant is also called night-blooming jasmine, lady of the night, or queen of the night. It is distinct from true jasmines, which belong to a different plant family and have a different toxicity profile. Despite the similar common names, do not assume safety data for true jasmine applies to Cestrum.

The small white berries that follow the flowers are particularly dangerous and may attract children and pets.

Which Parts Are Toxic?

All parts of the night-blooming jessamine plant are toxic, including the leaves, stems, flowers, and berries. The plant contains solanine and related glycoalkaloids, along with atropine-like anticholinergic alkaloids common to the Solanaceae family.

The berries pose the highest practical risk because they are visually appealing and accessible. The leaves and stems also contain these compounds and are dangerous if consumed.

Even the fragrance of the flowers can cause respiratory irritation in sensitive individuals when the plant blooms heavily in enclosed spaces.

Symptoms of Night-Blooming Jessamine Poisoning

Symptoms involve multiple body systems and can progress rapidly.

Dogs and cats: Vomiting, lethargy, and loss of appetite are early signs. As the alkaloids take effect, increased heart rate, muscle weakness, hyperexcitability, and central nervous system effects may develop. Kidney damage has been associated with serious ingestion. Without treatment, significant ingestion can be fatal.

Humans and children: Elevated body temperature, rapid pulse, and excessive salivation are among the first signs of serious ingestion. Severe gastrointestinal distress, including cramping, nausea, and vomiting, follows. Neurological symptoms include headache, dizziness, and confusion. Breathing difficulty and throat irritation can occur even from prolonged inhalation of the concentrated nighttime scent in enclosed spaces. Children are at higher risk given their smaller body mass.

What to Do If Someone Ingests Night-Blooming Jessamine

1. Remove any remaining plant material from the mouth.
2. Call poison control at 1-800-222-1222 (US) or your vet without delay.
3. Do not induce vomiting unless specifically directed by a medical professional.
4. If a pet or person is showing rapid heart rate, seizures, or difficulty breathing, go to an emergency room or emergency veterinary clinic immediately.
5. Bring a sample or clear photo of the plant to help with identification, and note how much was consumed and when.

Do not wait for symptoms to worsen before seeking help. The combination of cardiac and neurological effects means the situation can deteriorate quickly.

Ventilation and Fragrance Exposure

Night-blooming jessamine releases a very strong fragrance when in bloom at night. In enclosed spaces such as bedrooms or small indoor rooms, prolonged exposure to this fragrance has caused respiratory irritation, headaches, and nausea in sensitive individuals, particularly those with asthma or allergies. If you keep this plant indoors, ensure good ventilation during bloom, or move it outside during its blooming season.

Safe Handling and Keeping This Plant Away From Pets

Given its high toxicity rating, night-blooming jessamine is not recommended as a houseplant in homes with pets or young children. If you choose to keep it:

• Plant it in a location that is completely inaccessible to pets and children.
• Remove berries as they form to reduce the most attractive and dangerous part of the plant.
• Wear gloves when pruning and wash your hands afterward.
• Do not place cuttings or fallen branches where pets might find them.
• Consider replacing it with a safe fragrant alternative such as gardenia or non-toxic jasmine species if you have free-roaming pets or young children.

Frequently Asked Questions

Is night-blooming jessamine the same as jasmine? No. Night-blooming jessamine (Cestrum nocturnum) is not a true jasmine (Jasminum spp.). They share common name overlap but are in entirely different plant families with different toxicity profiles. Cestrum is significantly more toxic than most true jasmines.

Is the fragrance itself dangerous? The fragrance in enclosed, poorly ventilated spaces can cause breathing irritation, headaches, and nausea in sensitive people. This is a respiratory irritant effect, not systemic poisoning. Good ventilation largely prevents it.

Are the berries the most dangerous part? The berries are the highest practical risk because they attract pets and children. However, all parts of the plant are toxic and should be treated with equal caution.

My cat ate a leaf from this plant. What should I do? Call your vet immediately. Even a single leaf contains enough alkaloids to cause symptoms in a cat. Do not wait to see how the cat responds before getting professional guidance.

Can this plant grow indoors? It can, but it is not advisable in homes with pets or children. The combination of serious toxicity and strong nighttime fragrance makes it a poor choice for enclosed living spaces.