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Cestrum

Cestrum (SES-trum)

Family: Solanaceae Non-native Shrub (3-15 ft)

Cestrum is a genus of 232 accepted species of large flowering shrubs that are mostly evergreen and native to the warm temperate to tropical climates of Central and South America. They are members of the nightshade family (Solanaceae) and are commonly called jessamine due to their fragrant flowers. They may grow from 3 to 13 feet tall and equally as wide, depending on the species, and have clusters of small, colorful, tubular-shaped flowers. The genus name Cestrum originates from the Greek word kestron, meaning belt or girdle. These plants prefer full sun to partial shade and moist, well-drained, loamy soil. In very hot climates, they will benefit from afternoon shade. They are heat and humidity-tolerant. These plants are winter hardy in zones 9 to 11. In North Carolina, consider growing as a container plant that overwinters indoors; however, the fragrance may be overpowering. Best propagated by stem cuttings in late summer. Depending on the climate, these shrubs can be grown as evergreen, deciduous, perennial, or annual. They have a vase-shaped habit and branched, erect stems. The leaves are glossy, medium to dark green, and lanceolate, elliptical, or ovate. The flowers appear in clusters and are small, narrow, tubular, with flaring lobes. The colors of the blossoms range from creamy white, golden yellow, red or reddish-orange, yellow-green, pale green, or violet, and are dependent upon the species. The fruits are small green berries that ripen in various colors. Cestrum species will add color and fragrance to a border, driveway, or entrance. Consider planting as an ornamental hedge or screen in warmer climates. All parts of these plants are toxic if ingested. Keep this plant out of the reach of children and pets. Poisoning has been reported in cattle, sheep, goats, horses, and pigs. Insects, Diseases, and Other Plant Problems: No significant insect pests or diseases. Monitor of whiteflies.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 68 attributes.

How it fits the guild

Guild layer 3 - Shrub (3-15 ft) Optimal soil pH Acid (<6.0); Alkaline (>8.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Fills a similar niche Aesculus flava Euphorbia hypericifolia Breathless™ Group Lantana camara 'Miss Huff'

Full plant profile

Growing Conditions
Plant type
Annual; Poisonous; Shrub
Life cycle
Woody
USDA zones
9a, 9b, 10a, 10b, 11a, 11b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Loam (Silt); Sand
Soil pH
Acid (<6.0); Alkaline (>8.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist
Available space
3 feet-6 feet
Mature size
Height: 3 ft. 0 in. - 13 ft. 0 in. | Width: 3 ft. 0 in. - 13 ft. 0 in.
Growth rate
Rapid
Maintenance
Low
Canopy layer
3 - Shrub (3-15 ft)
Form & Appearance
Habit / form
Dense; Erect; Rounded; Spreading
Texture
Medium
Foliage
Broadleaf Evergreen; Deciduous
Leaf color
Green
Leaf type
Simple
Leaf arrangement
Alternate
Leaf shape
Elliptical; Lanceolate; Ovate
Leaf margin
Entire
Leaf feel
Glossy
Leaf value
Fragrant
Leaf size
3-6 inches long, 1-3 inches wide
Hairs present
No
Leaf detail
The leaves are medium to dark green, glossy, simple, lanceolate, elliptical, or ovate with entire margins. When the leaves are crushed, they release a strong smell.
Flower color
Cream/Tan; Gold/Yellow; Green; Orange; Purple/Lavender; Red/Burgundy; White
Flower value
Fragrant; Long Bloom Season; Showy
Flower form
Panicle
Flower shape
Tubular
Flower size
1-3 inches
Flower detail
The flowers appear in clusters either terminally or in the leaf axils. Each flower is tubular, with 5 lobes. The colors vary depending on the species (red, white, green, cream, violet, or orange). The flower may or may not be fragrant.
Bloom time
Summer
Fruit color
Black; Green; Purple/Lavender; Red/Burgundy; White
Fruit type
Berry
Fruit size
< 1 inch long, < 1 inch wide
Fruit detail
The fruit is initially a small, green berry that ripens to either white, red, black, or purple.
Stem detail
The stems are branched, erect, and spreading.
Wildlife & Ecology
Native status
Non-native
Origin
Florida to Tropical America
Distribution
Introduced: Bangladesh, Borneo, Cambodia, Cameroon, Cape Provinces, China, DR Congo, East Himalaya, Ethiopia, Fiji, Greece, India, Italy, Kenya, Laos, Lebanon-Syria, Malawi, Mauritius, Morocco, Mozambique, Myanmar, Nepal, New Caledonia, New South Wales, New Zealand, Pakistan, Philippines, Portugal, Queensland, Rwanda, Samoa, South Australia, Spain, Sri Lanka, Tanzania, Thailand, Tonga, Uganda, United States--CA, FL, HI, LA, and TX, Victoria, Vietnam, West Himalaya, Zambia, and Zimbabwe
Wildlife value
Caterpillars of several Lepidoptera species use this plant as a food source.
Attracts
Bees; Butterflies; Hummingbirds; Pollinators
Play value
Attractive Flowers; Attracts Pollinators; Buffer; Colorful; Easy to Grow; Screening
Food & Medicine
Harvest time
Fall
Fruit type
Berry

Edibility

All parts of this plant are toxic if ingested. The berries are especially poisonous to humans and animals.

Uses (ethnobotany)

Used in the landscape.

Landscape Use
Landscape location
Container; Meadow; Patio; Recreational Play Area; Slope/Bank; Walkways
Landscape theme
Butterfly Garden; Children's Garden; Cottage Garden; Nighttime Garden; Pollinator Garden
Design feature
Accent; Barrier; Border; Hedge; Small groups; Specimen
Garden tags
#poisonous #playground plant #long bloom time #heat tolerant #rabbit resistant #low maintenance #summer interest #summer flowers #humidity tolerant #deer resistant #spring interest #spring flowers #fall interest #fragrant flowers #showy flowers #showy #problem for dogs #problem for cats #poisonous to livestock #poisonous if ingested #problem for cattle #problem for children #problem for horses
Problems & Resistance
Problems
Poisonous to Humans; Problem for Cats; Problem for Children; Problem for Dogs; Problem for Horses
Resistant to
Deer; Heat; Humidity; Rabbits
Propagation
Stem Cutting
Poison severity
High
Poison parts
Bark; Flowers; Fruits; Leaves; Roots; Seeds; Stems
Poison symptoms
TOXIC ONLY IF LARGE QUANTITIES ARE EATEN. Headache, dizziness, hallucinations, nausea, vomiting, bloody diarrhea, muscular spasms and nervousness, high temperature, salivation and sweating, paralysis, and coma. It can also cause elevated calcium levels, hepatic necrosis, and liver failure.
Toxic principle
Solanine-type glycoalkaloids and atropine-like alkaloids, kaurene glycosides--potent hepatotoxin
Contact dermatitis
No
Toxicity summary
High severity poison; parts: Bark; Flowers; Fruits; Leaves; Roots; Seeds; Stems

Planted at Hunnicutt

Nobody’s planted this one yet.