Container Sizes; Blue Oat Grass, Helictotrichon sempervirens, supplies the landscape with spiky tufts of unmistakable blue ornamental grass. Zones: 4-9. A clumping plant, blue oat grass has been described as dramatic and yet well-behaved. Another advantage of container gardening is the ability to shuffle plants, making new combinations over the course of a season, as plants go on and off peak. Sedge looks like grass, but it is not. Too much retained water leads to rotting of the roots or crown. Gardener Les Brake of Willow, Alaska, just can't have enough blue oat grass. Plant beside landscape boulders, in rock gardens or at the edges of natural pools. Sedge plants can get lost in a crowded garden, but when grown in containers, their bronze tinged leaves gleam in the sun while the narrow blades pick up the slightest breeze. Blue oat grass is famously low maintenance, but it’s beneficial to occasionally clear dead growth from each plant. The appealing features of this grass variety are its spiky appearance and showy foliage. If you do not have the moist, partially shaded conditions it thrives in, try growing it in a pot. 'Karl Foerster' has wonderful, tall flower plumes that create an eye-catching focal point when grown in a container. Blue oat grass companion plants. At 6 to 12 inches tall, Japanese sweet flag adds a beautiful gold color and the familiar sweet scent that gives it its common name. Fountain grass is a natural for containers, filling the pot with its fountain-like, arching habit. The downside is that when you grow grasses in containers, they are less hardy—generally by about two hardiness zones. Planted in a container, you still get the imposing steel-blue, sword-shaped leaves that bend as they grow tall, and the spiky flower heads. You can easily pull out dead, brown stalks of grass by hand or use a garden rake to comb through the clump and remove old growth. How to Grow Texas Sotol (Dasylirion texanum), 12 Best Ornamental Grasses for Your Landscape, 10 Best Ornamental Grasses for Containers, 13 Types of Colorful Ornamental Grass for Fall, Golden Japanese Forest Grass (Hakone Grass) Plant Profile. Smaller than blue oat grass, the … Blue oat grass is well suited as a contrasting element in mixed perennial plantings, rock gardens and containers. Particularly beautiful planted in masses and paired with blue-gray Mediterranean plants. Blue oat grass is a striking evergreen perennial grass with distinctive blue-gray foliage and a clumping habit that can reach 24-30 in. The most popular way to propagate an ornamental grass like this one is by division; usually this is done every three or four years in the spring before the growing season commences. Carex morrowii ‘Evergold’, ‘Eversheen’, ‘Everest’, ‘Everlime’, ‘Everillo’ (S) 12-18 inches high, 24 inches wide Green gold, green/lime, green/white, lime green, all gold. Buy It: Blue Oat Grass, ($12, Direct Gardening) For example, an ornamental grass rated for USDA hardiness zone 5 when planted in the ground typically is hardy only to zone 7 when planted in a pot. Flowers are borne from the tips of the tapered leaves tipped with golden oat-like seed heads. However, you can always treat ornamental grasses in containers as annuals, replanting them each year. Tall wheat colored inflorescences develop in early summer and grow 6-12 in. Containers of blue oat grass bring a cooling blue-gray to the garden, as well as a gentle rustling sound and a texture that makes you want to reach out and touch the plant. Blue oat grass can adapt to life in a container, but you’ll need to take steps to ensure that the soil has adequate drainage. Design Ideas Blue Oat Grass is at home in desert gardens as well as in the traditional perennial border. (Note: the USDA zones listed below refer to ground-grown plants, not container-grown.) They can add a visual charm at any place if you grow them in containers. For this reason, heavy clay-like soils are not ideal. They need regular water, but most are not as thirsty as flowering plants. In summer, spikelets of tiny blue-green flowers bearing seeds appear at the top of the tall grass stalks in groups called panicles. Being Grown in Containers . Blue Oat Grass, botanical name Helictotrichon sempervirens, is suited to USDA zones 4-9, with full sun. Perennialresource.com Blue Oat Grass. It also has a tidy mounded habit and won't spread and take over your garden. Julie Thompson-Adolf is a master gardener and author with 13+ years of experience with year-round organic gardening, seed starting and saving, growing heirloom plants, perennials, and annuals, and sustainable and urban farming. The distinctive blue hue that this plant is known for is most prominent in dry climates. Introducing "One Thing": A New Video Series, The Spruce Gardening & Plant Care Review Board, The Spruce Renovations and Repair Review Board. Blue oat grass is a great option for planting in your garden, since it is not invasive and requires little regular maintenance to maintain its beautiful appearance. When grown in containers, its leaves glow in the sun and … The narrow-bladed leaves grow 3 to 5 feet tall, with flower spikes that extend to 4 or 5 feet. It thrives in sun and heat and can take a bit of neglect in a container. Marie Iannotti is an author, photographer, and speaker with 27 years of experience as a Cornell Cooperative Extension Horticulture Educator and Master Gardener. 18 inches tall with a gracefully arching growth habit 's a cool season grass and well-drained locations and can a. A 10-10-10 formula is typically recommended for ornamental blue oat grass in containers it 's a cool to! To rotting of the 'Rubrum ' cultivar is noted for having thin green leaves white... 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