Chilean cestrum (Cestrum parqui)

Also known as: Green poisonberry, Willow-leaf jessamine

Chilean cestrum (Cestrum parqui) is a deciduous shrub that produces clusters of yellow-green, tubular flowers from summer to fall, releasing a strong, sweet fragrance in the evening. Ideal for planting near outdoor seating areas, it creates a pleasant atmosphere for evening gatherings. Although recognized as a top plant by the Royal Horticultural Society, it can become invasive in warmer regions.

**Key Considerations:**
1. **Light Requirements**: Thrives in full sun but can adapt to partial shade.
2. **Soil Needs**: Prefers well-drained soils and can tolerate a range of soil types.
3. **Watering**: Once established, it is drought-tolerant but benefits from regular watering during dry spells.
4. **Size and Growth**: Reaches heights and widths of 6-10 feet, requiring ample space.
5. **Pruning**: Prune to shape and promote healthy growth.
6. **Hardiness Zones**: Suitable for USDA zones 8-11; may need winter protection in cooler areas.
7. **Toxicity**: All plant parts are toxic if ingested, so plant with caution around children and pets.
8. **Pest Resistance**: Generally resistant to pests, though occasionally affected by aphids and spider mites.

By considering these aspects, you can effectively integrate Chilean cestrum into your garden, enjoying its beauty and fragrance while managing its growth.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Chilean cestrum

Lifespan

Perennial

Plant Type

Tree, Shrub

Plant Height

1.2 m to 4.5 m

Spread

1.5 m

Leaf Color

Green

Flower Size

2.5 cm

Flower Color

Yellow Green

Images of Chilean cestrum

Quickly Identify Chilean cestrum

To identify Cestrum parqui, look for a shrub with glossy, dark green leaves that are lanceolate in shape. The plant produces clusters of small, tubular yellow-green flowers which are highly fragrant, especially in the evening.

Scientific Classification of Chilean cestrum

Phylum

Vascular plants

Class

Dicotyledons

Order

Solanales

Family

Nightshade

Genus

Cestrums

Species

Chilean cestrum

Planting and Growing of Chilean cestrum

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Full sun

Sunshine Duration

6-12 hours

Ideal Temperature

65-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Chilean cestrum?

Cestrum parqui enjoys a moderate amount of water. When watering, pour approximately 500 ml evenly around the base. Ensure you water until the soil is moist but not soggy, simulating a brief but nourishing rain shower.

What are the symptoms of an underwatered Chilean cestrum? ›

What should I do if my Chilean cestrum is not getting enough water? ›

What are the symptoms of an overwatered Chilean cestrum? ›

How to save an overwatered Chilean cestrum? ›

What Are the Sunlight Requirements for Chilean cestrum?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Cestrum parqui flourishes in full to partial sun, benefiting from about 6 to 8 hours of sunlight. Ideal lighting ensures sufficient energy for photosynthesis, leading to healthy foliage and profuse blooming.

How much sunlight is ideal for Cestrum parqui? ›

Can Cestrum parqui tolerate shade? ›

What if my garden has varying light conditions? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Chilean cestrum?

Ideal Temperature: 65 ~ 75℉

For optimal growth, Cestrum parqui thrives best in temperatures ranging from 65 to 75°F. This range allows the plant to photosynthesize effectively and maintain its growth and blooming cycles throughout the year without stress.

What Soil is Best for Chilean cestrum?

Soil type: Loam, Sandy loam, Sand soil

Soil PH: 6.5 ~ 7.5

Cestrum parqui thrives in well-drained soil to prevent root rot. The well-draining capability helps ensure that excess water doesn't linger around the roots, promoting healthier growth. Loamy soil with moderate fertility is ideal for Cestrum parqui. The presence of organic matter allows the plant to access necessary nutrients without being overwhelmed, resulting in balanced growth and vibrant foliage. While Cestrum parqui prefers well-drained soil, some moisture retention is beneficial, especially in sandy areas. Moderate moisture retention helps maintain hydration during dry spells without causing waterlogging.

How to Fertilize Chilean cestrum?

Fertilizer type: Balanced

For Cestrum parqui, the recommended amount is generally about half a tablespoon of balanced liquid fertilizer per gallon of water. This should be administered during the growing season, ensuring the plant receives nutrients without overwhelming it.

How to Prune Chilean cestrum?

Pruning Time: Spring, Summer

Start pruning by examining the plant for any dead or diseased branches. Carefully remove these sections using clean, sharp pruners to enhance the plant's overall health. Trim the plant to achieve a desirable shape, focusing on even distribution of foliage and symmetry. This not only enhances aesthetics but also promotes better air circulation. Regularly assess your plant for overcrowded branches, which can inhibit growth. Thin out these areas to allow sunlight penetration and encourage new growth. More About Pruning Techniques→

How to Propagate Chilean cestrum plant?

Propagate Time: Spring,Early summer

Choose mature seeds from a healthy Cestrum parqui plant. The seeds should be cleaned and free from any signs of disease or mold to ensure optimal germination rates.

Select a healthy parent plant and use sharp secateurs to cut a 4-6 inch section just below a leaf node. Remove the leaves from the lower part of the cutting to promote root development.

Plant the seeds or cuttings in a well-draining potting mix. Water immediately to moisten the soil, then place in a warm, bright location out of direct sunlight to encourage growth.

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How to Repot Chilean cestrum plant?

Repotting frequency: Every 2-3 years

Cestrum parqui signals the need for repotting when you notice roots emerging from the drainage holes or the growth seems stunted despite adequate care. This usually happens every two to three years, primarily in the active growing seasons of spring and summer. Observing these signs will ensure your plant continues to thrive.

When selecting a pot, ensure it is only slightly larger than the current one—roughly 1-2 inches in diameter larger. This helps prevent waterlogging and provides just enough room for growth without overwhelming the plant. A pot with good drainage holes is essential to keep the roots healthy.

Choosing a well-draining sandy loam is key for Cestrum parqui. This soil type allows for excellent drainage while retaining sufficient moisture, mimicking the plant's native habitat. Ensuring the right soil mix promotes healthy root development and prevents issues like root rot.

Toxicity of Chilean cestrum

Is Chilean cestrum toxic to humans?

Chilean cestrum presents a serious hazard to humans owing to its high toxicity levels. Every part of this plant is poisonous, and exposure usually occurs through ingestion. If consumed, chilean cestrum can lead to an array of severe symptoms, which may include, but are not limited to, gastrointestinal issues like severe vomiting and diarrhea, as well as additional systemic effects such as headaches, dizziness, and potentially fatal complications. All parts of the plant—leaves, stems, and berries—must be regarded as hazardous, necessitating vigilance to prevent accidental consumption, particularly by children who may be attracted to the plant's berries.

Is Chilean cestrum toxic to cat?

The Chilean cestrum presents a significant health hazard to felines, as every component of the plant is toxic. If cats consume any part of the Chilean cestrum, whether out of curiosity or by accident, they could face the risk of severe toxicity. The effects of ingestion can manifest as various physical distress symptoms, including gastrointestinal issues or neurological disturbances, signaling a serious condition that requires prompt veterinary intervention. Cat owners should prioritize immediate professional care at a veterinary clinic if there is any suspicion of ingestion, ensuring the best possible recovery for their beloved pet.

Is Chilean cestrum toxic to dog?

The Chilean cestrum presents a significant toxicity threat to dogs. Any part of this plant can cause poisoning in canines, as the entire organism is toxic. Dogs may inadvertently consume chilean cestrum, erroneously identifying it as harmless vegetation. Symptoms of poisoning in dogs can range from vomiting, diarrhea, and abdominal discomfort to more severe reactions like seizures or collapse, owing to the high toxicity levels. In the event that a dog consumes chilean cestrum, it is crucial to obtain immediate veterinary assistance to manage the poisoning and maximize the chances of recovery.

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.

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