Phlox drummondii subsp. mcallisteri, commonly known as McAllister’s Phlox, Drummond’s Phlox, or Annual Phlox, is an annual herb native to open woodlands, grasslands, and prairies of Texas in the United States. It thrives in these ecosystems, often on sandy soils. This species exhibits a rapid growth rate and typically reaches a height and width of 0.5-1.5 feet (0.15-0.5 meters). McAllister’s Phlox is notable for its vibrant flowers, which come in shades of red, pink, or white and are quite showy, blooming profusely in the spring and summer months.

The plant is valued for its colorful and long-lasting flowers, which make it a popular choice for garden borders, wildflower meadows, and as a ground cover. It is also used in container plantings due to its compact size. McAllister’s Phlox requires full sun to part shade and prefers medium to fast-draining sandy or loamy soils. It is relatively drought-tolerant once established, but it benefits from regular watering during prolonged dry periods. While generally easy to grow, it can be susceptible to powdery mildew and should be planted with good air circulation to minimize disease risk. Deadheading spent flowers can encourage a longer blooming period and prevent self-seeding if not desired.CC BY-SA 4.0