The cool-season blue oat grass is a clump-forming ornamental grass variety that is low maintenance and an attractive focal point for garden landscapes. The grass produces steel-blue foliage with pale-blue flower plumes. Blue oat grass is hardy to plant in USDA zones 3 through 8 and grows to height of 2 feet and width of 3 feet. Plant blue oat grass as a single accent plant or in groups to create an attractive border. Blue oat grass makes excellent plant fillers in gardens that have bare spaces.
Select a planting location that has moist, well draining soil and a minimum of six hours of direct sunlight. Choose a location that provides enough room to space the plants 12 to 18 inches apart.
Prepare the planting area by loosening the soil with a shovel or tiller. Work a general-purpose fertilizer into the soil one week prior to planting. Water the area well to assist with fertilizer absorption.
Dig a hole that is twice the size of the root ball and the same depth. Gently remove the grass clump from the container and place it in the hole. Fill soil around the root ball and gently pack in place to eliminate air pockets.
Water the blue oat grass generously after planting to soak the ground to several inches. Continue to water the plant at an amount of one inch per week through the growing season when the weekly rainfall amount is less than one inch.
Apply a 2- to 3-inch layer of mulch around the blue oat grass plants to assist with moisture retention.