Thunbergia grandiflora
Thunbergias
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Thunbergias (Thunbergia grandiflora) - Description
Thunbergia grandiflora is an evergreen vine in the family Acanthaceae. It is native to China, India, Nepal, Indochina and Burma and widely naturalised elsewhere. Common names include Bengal clockvine, Bengal trumpet, blue skyflower, blue thunbergia, blue trumpetvine, clockvine, skyflower and skyvine.
Thunbergias (Thunbergia grandiflora) - Blooming
Flowers generally show up in the summer. T. alata (Black-Eyed Susan Vine) has tubular flowers that come in a variety of colors, but all have purple-black throats.
Thunbergias (Thunbergia grandiflora) - Growth
Annuals, evergreen perennials, twining climbers, and shrubs. Thunbergia does well with full sun, but requires partial shade in the hottest of climates. Members of the genus Thunbergia grow as perennial vines that have twining stems. Shoots can be killed off by frost, but roots generally will survive. Less hardy plants (those grown in sites where temperatures drop below 61°F (16°C))should be grown in a warm or temperate greenhouse. In warmer areas, perennials and shrubs work well in a border. Climbing species can be trained over an arch, tree, or pergola.
Thunbergias (Thunbergia grandiflora) - Planting
Sow seeds in spring at 61-64°F (16-18°C) (16-18°F (16-18°C)). Can also propagate from greenwood cuttings and semi-ripe cuttings in summer.
Thunbergias (Thunbergia grandiflora) - Pest
Spider mites, whiteflies, and scale insects are a problem, especially under glass.
Thunbergias (Thunbergia grandiflora) - Soil and irrigation
Rich, well-drained soils provide the best growing medium for fast and abundant growth. Water liberally during the growing season, less in winter.
