Deciduous, Evergreen, Vines
Grown for showy flowers, the genus Mandevilla includes plants formerly called Dipladenia. Blossoms feature five broad lobes that flare out from a tubular throat; except as noted, they are unscented. Plants climb by twining. They survive outdoors only in the mildest regions. In colder areas, treat as annuals, or grow them in containers and move them indoors or to a greenhouse for the winter. Need heat to bloom; in coastal areas, train against a protected south- or west-facing wall, preferably with additional reflected heat from paving. Watch for spider mites. Growth may need thinning from time to time.Mandevilla laxa
This vine grows to 15 ft. or more, with heart-shaped, 2–6-in.-long leaves. Blooms in summer. Clustered flowers are white, 1 1/2–2 in. across, with a powerful perfume like that of gardenia. Requires less heat to bloom than other mandevillas. Provide rich soil. If the plant becomes badly tangled, cut it to the ground in winter; it will resprout and bloom on new growth. Roots are hardy to about 5°F/–15°C. Evergreen in frost-free gardens.
This vine grows to 15 ft. or more, with heart-shaped, 2–6-in.-long leaves. Blooms in summer. Clu...
This shrub from Korea and Japan resembles H. macrophylla. Grows to 4–6 ft. tall and wid...
This variety has 3-in., double pink flowers on a 3-ft. plant.