Salt cedar is an exotic weed in Illinois. The Illinois Exotic Weed Act prohibits the sale or distribution of any plant from the Tamarix genus in Illinois. This shrub spreads via seeds carried by wind and water, as well as by spreading rhizomes. It commonly grows in disturbed sites, riparian zones, and most wet areas (such as floodplains). It was introduced from Eurasia, and today can be found in the Western region of the United States and parts of the Eastern United States.
Salt cedar has a high seed production and germination rate that allows the shrub to take over natural areas. Additionally, the shrub has the ability to salinate the soil, creating an unfavorable or intolerable environment for plants. As an alternative, redbud (Cercis canadensis) is a good option. There are a number of native and non-native species that could be used in place of salt cedar. More desirable species may be found using the online Search Trees and Plants page of the Arboretum website. Before purchasing or planting, be sure to check for any local or state guidelines on this species, and ensure that this plant is suitable for its habitat by checking its attributes at mortonarb.org or plants.usda.gov.
- Family (English) Tamarix
- Family (botanic) Tamaricaeae
- Tree or plant type Tree, Shrub
- Foliage Deciduous (seasonally loses leaves)
- Native locale Non-native
- Size range Medium shrub (5-8 feet), Large shrub (more than 8 feet), Small tree (15-25 feet)
- Light exposure Full sun (6 hrs direct light daily)
- Hardiness zones Zone 3, Zone 4, Zone 5 (Northern Illinois), Zone 6 (City of Chicago), Zone 7, Zone 8
- Soil preference Acid soil
- Tolerances Occasional flooding, Road salt, Wet sites
- Season of interest midsummer
- Flower color and fragrance Pink
- Shape or form Irregular, Open, Thicket-forming
- Growth rate Fast
