Cypress Vine

Ipomoea quamoclit is native to tropical America, from Mexico and the Caribbean south through Central America to northern South America, where it grows in disturbed areas, forest edges, and open habitats in tropical lowlands.

• The species name quamoclit comes from the Nahuatl (Aztec) word "quamoclit" — the indigenous name for the plant
• Also known as "Star Glory," "Hummingbird Vine," "Cypressvine Morning Glory," and "Indian Pink"
• Known to the Aztecs and other Mesoamerican peoples before European contact
• Introduced to European horticulture in the 16th century, shortly after the Spanish conquest of Mexico
• Became a popular annual vine in European cottage gardens and has remained so for over 400 years
• The genus Ipomoea contains approximately 600–700 species, making it one of the largest genera in the Convolvulaceae family
• The feathery, finely dissected leaves are among the most distinctive foliage of any Ipomoea species
• Widely naturalized throughout the tropics and subtropics, including the southeastern US, India, Southeast Asia, and Pacific Islands
• The plant is sometimes confused with Cardinal Climber (Ipomoea × multifida), a hybrid of I. quamoclit × I. coccinea with slightly larger leaves and flowers
• Seeds may contain trace amounts of ergoline alkaloids similar to other Ipomoea species

Cypress Vine is a delicate, fast-growing herbaceous annual vine with twining stems reaching 2–4 m in a single growing season, creating a soft, airy, ferny texture.

Stems: Very slender, wiry, green, twining counterclockwise around supports. Entirely herbaceous.

Leaves: The most distinctive feature — pinnately dissected into extremely fine, thread-like segments, 5–10 cm long, creating a feathery, ferny, almost cloud-like texture. The leaves are so finely divided that they look like green threads or soft needles, very different from the broad heart-shaped leaves typical of most Ipomoea species. This fine texture gives the vine its common name "Cypress Vine" (resembling the feathery foliage of cypress trees).

Flowers: Small but vivid — tubular (salverform), 2–3 cm long and 1.5–2 cm across, with 5 pointed, star-shaped lobes in brilliant scarlet-red. The long, narrow tube is perfectly shaped for hummingbird beaks. Flowers are produced singly or in small clusters from the leaf axils, blooming continuously from early summer to frost. White and pink forms are also available.

Fruit: Small, round, papery capsules containing 4–6 small seeds.

Roots: Fibrous, shallow root system.

Cypress Vine grows naturally in disturbed areas, forest edges, roadsides, and open habitats throughout tropical America, where it scrambles through low vegetation.

• Thrives in full sun — requires at least 6 hours of direct sun for best flowering
• Adaptable to most soil types, including poor soils
• Moderately drought-tolerant once established
• The slender, tubular, red flowers are a textbook hummingbird pollination syndrome — the color, tube shape, and nectar are perfectly adapted to attract hummingbirds
• Also visited by butterflies and long-tongued bees
• The fine, feathery foliage creates a soft, airy effect in the garden, quite different from most vines
• Self-seeds prolifically in warm climates — can become weedy in frost-free regions
• In the southeastern US, it has naturalized and can be found along roadsides and in waste areas
• Not shade-tolerant — flowering diminishes in low light
• Killed by frost in all temperate zones
• Generally pest-free

Cypress Vine is one of the easiest annual vines to grow from seed and is excellent for creating a soft, ferny backdrop in the garden.

From Seed: Soak seeds in warm water overnight before sowing. Sow directly outdoors after all frost danger has passed, or start indoors 4–6 weeks early. Plant 6 mm deep. Germination takes 7–14 days at 20–25°C.

Site Selection: Full sun. Plant at the base of a trellis, fence, netting, or string support. The delicate vines need thin supports to twine around.

Soil: Any well-drained soil. Not fussy. pH 5.5–7.0.

Spacing: Thin seedlings to 15–20 cm apart.

Watering: Regular watering during establishment. Moderately drought-tolerant once established but best with consistent moisture.

Fertilization: Minimal. Avoid excess nitrogen. A light application of low-nitrogen fertilizer at planting is sufficient.

Support: Provide thin supports — netting, string, fishing line, or wire. The delicate stems need something thin to wrap around.

Companion Planting: Pairs beautifully with Heavenly Blue Morning Glory for a red-and-blue color combination on the same trellis.

Self-seeding: Allow some seed pods to mature for volunteer plants next year.

Hardiness: Grown as an annual in all zones (USDA 2–11). Killed by frost.

Propagation: By seed only.