Spartina alternifolia - Saltmarsh Cordgrass
The dominant grass in coastal plains of eastern North America, Saltmarsh Cordgrass grows 3 to 8 feet tall in moist, sandy coastal regions that are brackish to very salty. Its leaves are green with silvery white undersides. Flowers are 4 to 12 inch spikes appearing late summer through fall, with seeds ripening soon after. Roots are deep and fibrous, with rhizomatous colonization. A great plant for wildlife gardens in coastal areas of eastern North America, Saltmarsh Cordgrass requires full sun, moist to wet, preferably sandy soil, and lots of room, as it tends to form thick mats over time.