Lobelia cardinalis – Cardinal Flower

General Information: Cardinal Flower naturally grows in moist locations along streams and swamps. A clump-forming perennial with vivid spikes of large scarlet flowers that bloom July through September. The tubular flowers that appear at the apex of the lime green stems are very attractive to Butterflies and Hummingbirds. The common name is in reference to the red robes worn by Roman Catholic Cardinals.

Cultivation Details: The plant has no serious insect or disease problems, however the foliage contains alkaloids that can be toxic to humans if ingested. Despite this, the plant has a history of ethnobotanical ritual and medicinal use among Indigenous Peoples in the plant’s native range. Consider Cardinal Flower for rewilding, woodland gardens, pollinator gardens, wetland plantings, or as a specimen plant.

Growing Requirements: Plant in full sun to nearly full shade. Plants in deep shade do not live as long as those in partial shade or sun. Requires damp to wet soils in full sun. Apply mulch for best results. Prefers rich, moist, soils. Tolerates brief flooding. Tolerates most soil types. Suitable for mildly acidic, neutral, and mildly alkaline soils.