Cobaea scandens, commonly known as Cup-and-Saucer Vine or Cathedral Bells, is a vigorous climbing plant prized for its unique bell-shaped flowers that start green and mature to deep purple. This fast-growing annual thrives in full sun to partial shade and well-drained soil, making it ideal for trellises, fences, or arbors. Its lush foliage and cascading blooms attract pollinators like bees and butterflies, adding a charming vertical accent to gardens from late spring through summer.