Jasmine and Star Jasmine belong to different botanical families despite their similar names and fragrant flowers. True Jasmine, commonly referred to as *Jasminum*, is part of the Oleaceae (olive) family. Popular species include *Jasminum officinale* (Common Jasmine) and *Jasminum sambac* (Arabian Jasmine). In contrast, Star Jasmine (*Trachelospermum jasminoides*) is a member of the Apocynaceae (dogbane) family, which includes plants like oleander and periwinkle. This taxonomic distinction highlights their evolutionary differences.
True Jasmine species are typically deciduous or evergreen shrubs or vines, depending on the variety. For example, *Jasminum officinale* is a climbing vine, while *Jasminum nudiflorum* (Winter Jasmine) grows as a shrub. Star Jasmine, however, is an evergreen woody vine that clings tightly to surfaces using twining stems. Its growth habit makes it ideal for ground cover or vertical trellises, whereas true jasmines may require support to climb or sprawl.
The foliage of these plants also differs. True Jasmine leaves are pinnate (feather-like), with 5–9 leaflets arranged opposite each other along the stem. The leaves are bright green and slightly textured. Star Jasmine, on the other hand, has simple, oval-shaped leaves that grow in pairs and are dark green, glossy, and leathery. The leaves of Star Jasmine may turn reddish in colder weather, a trait not seen in true jasmines.
Both plants produce fragrant white flowers, but their structures vary. True Jasmine flowers are tubular with five to eight petals, often opening flat to reveal a prominent yellow center. The fragrance is intensely sweet and floral, often used in perfumery. Star Jasmine flowers are star-shaped (hence the name) with five pinwheel-like petals and a milder, honey-like scent. The blooms of Star Jasmine are smaller and grow in clusters, while true jasmine flowers may appear singly or in loose groups.
True Jasmine species are generally tropical or subtropical, thriving in USDA zones 7–10. Some varieties, like Winter Jasmine, tolerate cooler temperatures. Star Jasmine is more cold-hardy, surviving in zones 7–11, and can withstand brief frosts. Both prefer full sun to partial shade, but Star Jasmine is more drought-tolerant once established, making it suitable for xeriscaping in warmer climates.
True Jasmine is often grown for its ornamental and aromatic qualities, ideal for trellises, arbors, or containers. Star Jasmine is favored for its dense foliage and versatility—used as a ground cover, hedge, or climbing vine. Its resilience to pruning and pollution also makes it a popular urban landscaping choice. In contrast, true jasmines are more delicate and require careful maintenance to thrive.
A key difference lies in toxicity. True Jasmine (*Jasminum* spp.) is non-toxic to humans and pets, while Star Jasmine contains toxic compounds like glycosides, which can be harmful if ingested by dogs or cats. Gardeners with pets should consider this when selecting plants.
True Jasmine propagates easily from cuttings or layering and prefers well-drained soil with regular watering. Star Jasmine is similarly propagated but is more adaptable to poor soil and requires less frequent watering once established. Both benefit from occasional fertilization, but Star Jasmine is notably low-maintenance compared to true jasmines.
