Cestrum nocturnum, known by names like Night-blooming Jasmine, Lady of the Night, or Queen of the Night, is cultivated globally for its intensely powerful fragrance. This sweet perfume is released only after the sun sets. The nocturnal scent can permeate the air, traveling significant distances.
Identifying Cestrum Nocturnum
This plant is an upright, woody evergreen shrub that can reach heights of up to 4 meters. It has simple, glossy green leaves that are oval to spearhead-shaped and 10 to 15 centimeters long. During the day, its flowers are visually unremarkable; they are small, slender, greenish-white or pale yellow, and tubular in shape, remaining tightly closed.
Following the blooming period from summer through fall, the plant produces small, round berries that ripen to a glossy white. Despite its common name, Night-blooming Jasmine is not a true jasmine. It is a member of the Solanaceae family, also known as the nightshade family, which includes plants like tomatoes and potatoes.
Growing and Maintenance
For robust flowering, Cestrum nocturnum should be planted in a location that receives full sun to partial shade. It thrives in well-draining soil and prefers consistent moisture, requiring watering every one to two weeks, but is sensitive to being waterlogged. Allowing the soil to dry out slightly between waterings is a good practice to prevent root issues.
The plant is best suited for warm climates, specifically USDA hardiness zones 9 through 11. In colder regions, it can be grown in large containers. This allows it to be moved indoors to a protected location, like a garage or basement, to overwinter and avoid frost damage.
To maintain a desirable shape and encourage new growth, pruning is recommended after the plant has finished its blooming cycle. This helps manage its size and stimulates the development of wood that will produce flowers in the following season. Routine monitoring for common garden pests such as aphids, whiteflies, or the pink hibiscus mealybug is also part of its upkeep.
Toxicity and Precautions
A significant consideration for this plant is its toxicity. All parts of Cestrum nocturnum, particularly the berries, are toxic if ingested by humans or animals. Ingestion can lead to symptoms such as an elevated temperature, gastritis, and an increased pulse. For pets like cats and dogs, consumption can cause gastrointestinal distress and seizures, necessitating immediate veterinary attention.
Beyond ingestion, the plant’s potent fragrance can be a source of discomfort for some individuals. The strong scent, especially in enclosed areas, can cause respiratory irritation, headaches, dizziness, and nausea. People with asthma or other respiratory sensitivities may find that proximity to the flowering plant at night can trigger their symptoms.