08/09/2026
Meet Leymus arenarius ( aka Elymus arenarius) or coastal Blue dune grass. This is a spreading but striking grass, known for its steel blue foliage followed by yellow flowerheads.
This grass is highly drought- and salt-tolerant as well as resistant to browsing by deer and rabbits. Plant it in a location that takes into account its aggressive tendencies. It makes an effective ground cover for erosion-prone areas. It's not for everyone, but if you have an area where you have runoff/erosion issues, OR want to plant it in a container, it is a lovely thing. Some use its blue-green blades in floral arrangements, which is pretty cool.
Plant in full sun to partial shade in moist but well-drained soil. It prefers sandy soils but withstands a variety of soil types, moisture levels, and pHs.
Want the blue colour but not the rowdy tendencies? Try one of the switchgrasses such as Panicum Thundercloud, Dallas Blues, or Heavy Metal. These are clumping grasses rather than rhizome-spreaders.