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Fourwing saltbush [Atriplex canescens (Pursh) Nutt.] is an important species in arid and semiarid plant communities. It is palatable, drought resistant, and provides good soil protection and food for wildlife. In many areas of the world, lands once used for growing crops are now without vegetation because of declining water tables, brackish groundwater, saline soil conditions, or combinations of these. Fourwing saltbush can grow in such areas and improve site productivity and stability. This study tested the survival and establishment of two different ages of seedlings using 17 different saline supplemental irrigation schedules. Large seedlings (18.5 cm at start) survived all watering regimes, which included 8 weeks of 100% seawater irrigation. They grew to a height that ranged between 24.9 and 37.6 cm, depending on the concentrations and frequency of saline water irrigations. Small seedlings (5.2 cm at start) had significantly lower survival at all concentrations of irrigation water. Small plant height ranged from 10.9 to 27.6 cm after 8 weeks of irrigation, depending on treatment salinity. Dry weights of tops and roots after 8 weeks for both size seedlings followed similar trends.