Grass, Beyond Blue Overview Category: Perennial grasses Common Name: Grass, Beyond Blue Botanical Name: Festuca glauca 'Casca11' PP #23,307, Beyond Blue Sun Exposure: Full sun Height: 8-12 in. Spread: 12-18 in. See notes | Back to perennial grasses Notes A dense mound of intense, colorfast, powder blue foliage that provides waterwise, heat and humidity tolerant texture. Buff-colored plumes create eye-catching contrast in late summer. Great to accent a rock garden.