Elymus arenarius 'Blue Dune' (Blue Lyme Grass)Bright blue gray blades grow 24 30" and produce stiff, upright, flower spikes that turn buff in late summer. Spreads vigorously by rhizomes, filling in large areas quickly and may require containment. Useful for planting in areas affected by wind, salt air and sandy soils along the mid Atlantic coast. Tolerant of seasonal clean up by mowing at winter's end. Plant 18" apart. Sunlight Requirements: Full Sun to Partial Shade USDA Hardiness Zones: 4 9