Wetland Plants chosen for wastewater treatment represent an attractive and diverse collection of native North Carolina species, consisting primarily of shrubs, ornamentals, and persistent emergent wetland plants, such as wax myrtle, Virginia sweet spire, loblolly bay, lizard’s tail, pickerel weed, woolgrass, softstem bulrush and hardstem bulrush.

Wetland plants must have extensive root systems to foster large colonies of pollution-eating microbes.

These plants will be exposed to the elements and seasonal variations, unlike the aquatic plants growing in the greenhouse. Wetland plants must be able to tolerate a temperature variation from 10o to 40Celsius, and they must not have a photo period-induced dormancy (i.e. they must remain active throughout the year). They are selected for their high rates of water and nutrient utilization and their ability to resist diseases.