Bleeding Heart Vine

The Bleeding Heart Vine, botanically classified as Clerodendrum thomsoniae, is an exceptionally striking, evergreen tropical climbing woody vine belonging to the Lamiaceae (mint) family. Native to the warm, humid, rain-rich forest margins of tropical West Africa (ranging from Cameroon to Senegal), this highly ornamental liana is universally beloved for its spectacular, bicolored flowers. It is highly valued in modern landscape design for its ability to produce rich clusters of contrast-rich, heart-shaped blooms that bring dramatic color to vertical trellises.

Growing as a vigorous climber that reaches lengths of 10 to 15 feet in ideal conditions, Clerodendrum thomsoniae features dark-green, deeply veined, opposite oval leaves that measure 3 to 5 inches in length. From late spring through autumn, the vine produces large, dense terminal clusters of flowers. The blooms are a visual masterpiece of contrast: each flower features a large, puffy, heart-shaped pure white calyx (composed of fused sepals) from which a bright crimson-red corolla of petals emerges, followed by long, sweeping stamens.

The reproductive morphology of the Bleeding Heart Vine is represented by the botanical floral formula % ⚥ K(5) C(5) A4 G(2). This formula indicates that the flower is bilaterally symmetrical (zygomorphic) and bisexual. The prominent white calyx is composed of 5 sepals fused into a five-angled star balloon, while the corolla is composed of 5 petals fused into a tube that flares into 5 rich crimson lobes. The androecium contains 4 highly exerted (protruding) stamens, surrounding a 2-carpellate superior ovary.

Horticulturally, Clerodendrum thomsoniae is a warm-climate tropical beauty that requires bright, indirect sunlight to partial afternoon shade to prevent foliage burn. It demands rich, fertile, moist, organic humus-heavy soils with exceptional drainage, requiring consistent moisture without sitting in stagnant water. It benefits from high relative humidity and regular winter protection, making it an excellent candidate for large container pots that can be brought indoors in cooler USDA zones (hardy to zones 9 through 11).

The genus name Clerodendrum is a classical combination of the Greek words 'kleros,' meaning 'chance' or 'fate,' and 'dendron,' meaning 'tree,' historically referencing the variable medicinal virtues of species in this genus, while the specific epithet thomsoniae honors the wife of William Cooper Thomson, a 19th-century Scottish missionary and physician in Nigeria. Famed on the Indian subcontinent as Kadala Poo (கடல பூ) and in Bengali as Jalāmukhī Latā (জ্বালামুখী লতা), it represents intense passion, dualities, and exotic grace.

For pet owners, it is vital to make a crucial botanical distinction: while the common temperate garden Bleeding Heart plant (Dicentra spectabilis) is highly toxic, the tropical Bleeding Heart Vine (*Clerodendrum thomsoniae*) is completely NON-TOXIC to cats, dogs, and horses. Chewing on its glossy leaves or star-shaped calyces poses no threat of alkaloid poisoning, making it a highly premium, pet-friendly choice for patio trellises. To learn more about pet safety in tropical garden spaces, please visit our Pet Guard catalog.

Bleeding Heart Vine is occasionally confused with the herbaceous Dicentra or vining Bougainvillea. It is easily distinguished because Clerodendrum thomsoniae features rigid, woody climbing stems with large opposite leaves and distinct white-and-red balloon flowers, whereas Dicentra is a soft, fleshy shade-loving herb with pink nodding hearts. It creates a stunning tropical tapestry when grown beside Passion Flower or climbing Morning Glory. Discover more vining selections in our Flower Identifier.