Cardinal Flower (Lobelia cardinalis)

Cardinal Flower (Lobelia cardinalis)

Cardinal Flower is the most intensely red wildflower in North America — a saturated, burning scarlet that seems almost artificial in its brilliance, rising on tall spikes above the bayou's edge in late summer. It is the ruby-throated hummingbird's favorite flower, and the relationship between the two is one of the most perfectly co-evolved partnerships in the natural world: the flower's tubular shape, red color, and lack of landing platform are all specifically adapted to exclude bees and welcome hummingbirds.

Botanical Profile

• Family: Campanulaceae (Bellflower family)
• Native Range: Eastern North America from New Brunswick to Florida and west to the Rocky Mountains; native to Louisiana's stream banks, bayou edges, and moist woodland margins
• USDA Hardiness Zones: 3–9
• Mature Size: 2–4 feet tall
• Bloom Time: July–September
• Sun: Full sun to part shade
• Soil: Moist to wet; tolerates clay and periodic flooding; thrives along bayou edges and in rain gardens

Ecological Role

Cardinal Flower is the premier native plant for ruby-throated hummingbirds in the Eastern U.S. — its red tubular flowers producing abundant nectar accessible only to long-billed hummingbirds and sphinx moths. It is a critical refueling stop for hummingbirds during their fall migration through Louisiana. Its seeds are consumed by American Goldfinches. It is a short-lived perennial that self-seeds freely, maintaining colonies along moist garden edges for years without replanting.

Cultural Heritage

Cardinal Flower's extraordinary red color made it one of the most celebrated wildflowers in both Indigenous and European botanical traditions. The Cherokee used it medicinally for typhoid fever and as a love charm. Cajun and Creole gardeners prized it as a hummingbird plant, planting it near the gallery where the hummingbirds' visits could be enjoyed from the porch.

In the Living Canopy & Understory

Part of the Jardin — The Living Canopy & Understory collection at Big Mamou Enterprises, Cardinal Flower is the bayou garden's most brilliant hummingbird beacon — scarlet, saturated, and perfectly designed to call the hummingbirds home.