Commelina virginica, commonly known as Virginia dayflower, is a perennial herb that is native to moist to wet areas in open woodlands, along streams, and in marshy fields in the southeastern United States. It typically grows to a height of 1-2 feet (30-60 cm) and spreads by creeping rhizomes. This plant was first described by Carl Linnaeus in 1762, and phylogenetic studies have shown it to be closely related to African species Commelina capitata and Commelina congesta. The Virginia dayflower is characterized by its bright blue, three-petaled flowers that bloom from late spring to early fall, with each flower lasting only a single day. The foliage is a rich green, and the plant features distinctive red hairs at the top of the leaf sheaths. The inflorescences are clustered on short stalks, adding to its ornamental appeal.

In cultivation, the Virginia dayflower is valued for its vibrant flowers and ability to thrive in wet conditions, making it suitable for rain gardens, water features, and naturalized areas. It prefers full sun to part shade and requires consistently moist soil. While generally low-maintenance, it can spread aggressively in ideal conditions, which should be considered when planting. The Virginia dayflower is not commonly afflicted by serious pests or diseases, but it can become invasive if not managed properly. It is not typically used in formal garden settings due to its spreading habit, but it can be an attractive addition to wildlife gardens, as it provides nectar for pollinators.CC BY-SA 4.0