Jasmine (Jasminum spp.) and Star Jasmine (Trachelospermum jasminoides) belong to different plant families despite their similar names and fragrant flowers. True jasmine is part of the Oleaceae family, which includes olives, while Star Jasmine is a member of the Apocynaceae family, closely related to periwinkles. This distinction affects their growth habits, hardiness, and care requirements.
True jasmine species, such as Jasminum officinale (Common Jasmine), are typically deciduous or semi-evergreen vines or shrubs with twining stems. In contrast, Star Jasmine is an evergreen woody vine that clings to surfaces using aerial roots. While both can climb, Star Jasmine is more versatile as a ground cover or container plant, whereas true jasmine often requires support structures like trellises.
Jasmine thrives in USDA zones 7–10, preferring warm climates with mild winters. Some varieties, like Jasminum nudiflorum, tolerate cooler temperatures. Star Jasmine is slightly hardier (USDA zones 8–10) but less cold-tolerant than certain jasmine species. Both dislike frost, but Star Jasmine may suffer more damage in prolonged freezing conditions.
True jasmine prefers full sun to partial shade (4–6 hours of direct sunlight daily) for optimal flowering. Insufficient light reduces blooms. Star Jasmine adapts better to shade, tolerating 2–4 hours of sun, though flowering may diminish. In hot climates, afternoon shade benefits both plants to prevent leaf scorch.
Jasmine requires consistent moisture but dislikes soggy soil. Water deeply when the top inch of soil dries out. Star Jasmine is more drought-tolerant once established but benefits from regular watering during dry spells. Both plants need well-draining soil to prevent root rot.
True jasmine grows best in slightly acidic to neutral soil (pH 6.0–7.0) enriched with organic matter. Star Jasmine tolerates a wider pH range (5.5–7.5) and adapts to poorer soils, though it flourishes in fertile, loamy substrates. Mulching helps retain moisture for both species.
Feed jasmine monthly during the growing season with a balanced fertilizer (e.g., 10-10-10) or a bloom-boosting formula high in phosphorus. Star Jasmine requires less frequent feeding (every 6–8 weeks) with a slow-release fertilizer. Over-fertilizing either plant can lead to excessive foliage at the expense of flowers.
Prune true jasmine after flowering to control size and encourage bushiness. Remove dead or tangled stems. Star Jasmine responds well to light pruning year-round but benefits from a heavier trim in early spring to shape the plant. Both species may become invasive if left unmanaged.
Jasmine is susceptible to aphids, spider mites, and whiteflies, especially in dry conditions. Star Jasmine faces fewer pest issues but may attract scale insects. Both can develop fungal diseases like powdery mildew in humid environments. Proper air circulation and avoiding overhead watering help mitigate risks.
True jasmine produces tubular white, yellow, or pink flowers with an intensely sweet fragrance, often blooming from spring to fall. Star Jasmine features star-shaped white flowers with a lighter, citrusy scent, primarily blooming in late spring to early summer. Flowering frequency depends on climate and care.
