Trachelospermum jasminoides Tricolor (Tricolour)

The Royal Horticultural Society's page, a British reference, is the only text read that describes this cultivar. It asks for fertile, well-drained soil in full sun or partial shade with shelter from cold, drying winds, for example against a warm, sunny wall, and lists chalk, loam and sand, moist but well-drained or well-drained, acid, alkaline or neutral. Its hardiness rating is H4, which its key reads as hardy through most of the United Kingdom, and it says that in areas prone to severe frosts the plant is grown in a cool greenhouse or conservatory. No Australian reference read gives a frost figure or climate zones.

Pruning is the society's group 11, in early spring; the saved page does not say what that group involves. It propagates the plant by semi-ripe cuttings with bottom heat in summer or by layering in autumn, and says it may be susceptible to cushion scale, mealybugs, glasshouse red spider mite and honey fungus, a British list.

Of the species, the Missouri Plant Finder says the twining stems require support, both American references record a milky sap in the stems, and the NC State toolbox calls it drought-tolerant once established. Nothing read says whether the variegated form differs from the species in hardiness or in drought tolerance.

The society suggests it, among other uses, for screens, for containers and beside a wall. The society gives a spread of up to 2.5 m, and no reference read gives a planting density for a screen. By the figures saved it is the smaller plant: 2.5 to 4 m high against the vines of up to 6.1 m that the two American references give for the species, and slow-growing by the society where the NC State toolbox rates the species' growth as rapid. The flowers are white and very fragrant; the society gives them in late summer, the American references on the species in late spring and sporadically in summer.

The HortOS listing gives the name in both spellings, Tricolor and Tricolour; the Royal Horticultural Society writes Tricolor. The table above shows the sizes growers list. The society calls the plant slow-growing and gives 5 to 10 years to maturity. What to check on roots, pests and hardening off is in the guide to judging nursery plant quality. Stock crossing a state border travels under the state and territory biosecurity rules on moving plants and soil between states. The gap to know: no reference read gives a frost rating for Australian conditions or describes how the cultivar behaves here.