Climb into color with Thunbergia, the fast-growing Black-eyed Susan vine that transforms trellises, fences, and containers into vibrant vertical displays. Loved for its rapid growth and nonstop blooms, this sun-seeking climber performs best with plenty of direct light, consistent moisture, and regular feeding to fuel its energetic flowering habit. In warm climates it can behave as a tender perennial, while in cooler regions it shines as a quick, season-long annual that brings height, texture, and tropical charm to the garden in a single season.