Ageratina havanensis, commonly known as Havana snakeroot or white mistflower, is an evergreen shrub native to limestone outcrops, oak woodlands, and brushlands in Texas, as well as to forests and scrublands in northeastern and east-central Mexico, including the states of Veracruz, Tamaulipas, Coahuila, Nuevo León, Hidalgo, San Luis Potosí, Puebla, Guanajuato, and Querétaro. It is also found in Cuba. The plant typically grows to a height of 2-3 feet (0.6-0.9 meters) and a similar width, with a mounding form. It features clusters of fluffy, white flowers that bloom from late summer to fall, attracting butterflies and other pollinators. The leaves are dark green and aromatic when crushed.

Havana snakeroot is valued for its long-lasting, showy flowers and its ability to thrive in a variety of conditions, including drought. It is often used in butterfly gardens, as a border plant, or in naturalized areas. This species prefers well-drained soils, tolerates a range of soil types, and requires minimal water once established. It does best in full sun to part shade. While generally disease-resistant, it can be susceptible to root rot in poorly drained soils. Ageratina havanensis is not known for aggressive roots or significant disease problems, making it a low-maintenance choice for gardeners.CC BY-SA 4.0