Love in a Puff (Cardiospermum halicacabum): Balloon Vine with Heart Seeds

Cardiospermum halicacabum, known as Love in a Puff, Balloon Vine, or Heartseed, is a delicate, tendril-climbing annual vine named for its unique, inflated, papery seed capsules (balloons) each containing three black seeds with a perfect white heart-shaped mark.

Botanical Profile

Culture & Charm

Native to tropical Africa, Asia, and the Americas, this fast-growing vine reaches 10–15 feet. The leaves are biternately compound, fine-textured. Small, white flowers appear in summer, followed by the showy, light green balloons (1–1.5 inches) that mature to brown. The heart-marked seeds are a delightful discovery.

It grows easily from seed in full sun to part shade, average soil, and regular water. Use on trellises, fences, or as a weaving annual. In warm climates (zones 9–11), it can be perennial and potentially invasive—deadhead balloons before they split. A whimsical, educational plant for children's gardens and conversation.