Purple bergamot is a native perennial wildflower of eastern North America, found in the rich, moist, acidic soils of stream banks, thickets, and ditches across North Carolina and beyond. Its identity has long been debated by botanists — the species name, meaning intermediate, acknowledges the difficulty in distinguishing it from wild bergamot, and it may be a natural hybrid between M. fistulosa and M. didyma. Whatever its origins, it performs reliably in wet or consistently moist sites where many other monardas would not be the first choice.

Growing 2 to 3 feet tall, purple bergamot thrives in full sun but tolerates partial shade better than most in the genus. The flowers are prized by bees and hummingbirds, and the crushed leaves release a strong mint fragrance. Give it room to form a proper clump — it spreads by rhizomes and benefits from the space to expand naturally. Rain gardens and stream-edge plantings are its best use in designed landscapes. Powdery mildew appears mainly in late season after flowering; keeping the soil consistently moist and pruning for airflow reduces its severity.