Thunbergia coccinea (Scarlet Thunbergia)

Thunbergia coccinea is a vigorous tropical climbing vine native to Southeast Asia, admired for its dramatic pendulous clusters of tubular, deep red to crimson flowers. The long, cascading inflorescences can reach impressive lengths and create a striking contrast against the plant's large, soft green, heart shaped to ovate leaves. This species is a true showpiece climber, often trained on pergolas, trellises, or large supports where its flowering chains can hang freely and be viewed from below.

Thunbergia coccinea grows best in full sun to bright light, with some protection from intense midday heat in very hot climates. It prefers fertile, well drained soil with regular watering during active growth, though it does not tolerate waterlogged conditions. Warm temperatures are essential for consistent flowering, and growth slows markedly in cool weather. USDA Plant Hardiness Zones 10-11, with minimum temperatures around 35 F; it is frost sensitive and is grown as a container or conservatory plant in cooler regions, where winter protection is required.