Cestrum aurantiacum (orange cestrum, "orange jessamine", orange-flowering jessamine, and yellow cestrum; syn. Capraria lanceolata L.f.) is native to North and South America. This plant is used as an ornamental plant, and it is a poisonous plant if eaten by animals. It is regarded as medicinal in Peru.

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Size and Growth

Most varieties of Cestrum grow fast, producing green leaves and stems of varying lengths.

Cestrums tend to grow about one to three feet per year. The branches of these bushy plants may reach up to 10′ feet when given room to grow.

Orange Cestrum is a popular variety that produces vine-like growth, making it suitable for training on a trellis or growing in a hanging basket.

Red Cestrum elegans produces arching branches and purplish-red berries.

The length of the leaves also varies.

Night jessamine produces leaves measuring four to eight inches while willow-leafed jessamine produces a dense canopy of three to six-inch-long leaves and many branches.

Flowering and Fragrance

The color of the flowers of Centrums may include white, red, orange, or purple, depending on the species.

They tend to bloom in the spring or summer, but flowers may appear at any time of the year.

The trumpet-shaped flowers typically grow in clusters 10 or 12 flowers on the ends of short stems extending from the branches.

Light and Temperature

When grown outdoors, the Cestrum tolerate light shade or full sun. Brighter light helps encourage longer lasting blooms.

If grown behind glass, the plants require bright, indirect sunlight.

Place them in south-facing or west-facing windows for the most exposure to the sun.

Most species of Cestrum are winter hardy in USDA hardiness zones 8 to 11 and can tolerate temperatures down to 50° degrees Fahrenheit during the colder months.

In the summer, Cestrum grows best in temperatures in the upper 70° degrees Fahrenheit.

Watering and Feeding

Never allow the soil to completely dry. Water the Cestrum when the top one or two inches of soil has dried.

When watering, soak Cestrum thoroughly and allow the water to drain around the base.

For healthier growth, feed the plants once or twice per month. Dilute the liquid fertilizer before use.

Soil and Transplanting

Use large tubs, clay pots, or baskets filled with rich soil with good drainage.

In warm regions, the plants can grow in the ground, if they’re not considered invasive in your area.

Potted plants require repotting every two to three years. Repot into larger containers if needed.

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Pictures from https://davesgarden.com/guides/pf/go/206748 & https://springmeadownursery.com/plantfinder/juiced-orange-17050/

Info from Central Texas Gardener: https://plantcaretoday.com/cestrum-plant.html