Confederate Jasmine (Trachelospermum jasminoides) also known as Star Jasmine is not a true jasmine but referred to as one because of the fragrant jasmine-like flowers it produces. It is hardy in zones 8-10 and ubiquitous in the southern states. Cultivar Madison is hardy up to zone 7.
The twining foliage emerges with light green lance-shaped leaves and then matures to a glossy, dark green color which produces clusters of white star-shaped flowers in late spring to summer. Once established, this fast growing evergreen vine, which can grow up to 20 feet, can be trained to climb supports such as fences, pergolas, pillar and trees. With tip pinching and trimming, it can also be grown as a spreading shrub or a weed choking groundcover. Its tight growing habit also makes it an ideal candidate for topiaries, trailing containers and hanging baskets.
Confederate jasmine prefers fertile well-drained soil with full sun to part shade exposure. Fertilize from early spring to fall with a well balanced (NPK) fertilizer for acid loving plants.
Pruning is important to control excessive growth and thicken the foliage. Prune straggly and tangled vine grown indoors in the fall/winter when growth has stopped and/or after blooming to promote lateral branching. Because C. jasmine blooms on last year’s growth, the best time to prune outdoor plants is after blooming (April-May). Prune away dead, weak, cold damaged shoots in late winter after danger of frost is over. Prune back no more than 1/3 of the vine at a time.
The semi-hardwood cuttings dipped in rooting hormone can be propagated in the spring/summer to produce additional plants. Cuttings exude a white milky sap which can be a skin irritant.
Trachelospermum jasminoides tolerates a minimum temperature of 40 degrees and therefore in colder climates needs to be grown in a container and brought indoors for the winter. As a houseplant, they can adapt to moderate light exposure as well as neglectful watering but grow best in bright indirect light in the summer and need a minimum of 4 hours of direct sunlight in the winter. Night temperatures of 50-55 and 68-72 during the day are preferred. In the winter provide added humidity but water less.
Another cultivar, Trachelospermum asiaticum cv mandianum, Asiatic Jasmine is also a popular container plant. It has smaller, oval leaves and sweeter yellowish white flowers with a longer blooming time which can start(depending on temperatures) early to mid-winter to the summer.
Ref. Clemson.edu & Logee’s Container Plants