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View compareOrnamental grasses are as close to maintenance-free as plants can get.
Whether planted in large groupings, hedges, or tossed into the landscape for texture and color, they make great focal points as well as accents.
Most ornamental grasses prefer at least 6 hours of sun a day, but many are flexible and will get by on just a bit less. Medium growing grasses like the Hameln can be spaced about 2 feet apart. Smaller growers such as the Little Bunny, Elijah Blue, Acorus Ogon, Blue Zinger, and Pennsylvanica Sedge can be planted much closer, even 8 or so inches apart.
They will need just enough room to spread their wings a bit. The taller varieties (in the 3-foot and up range) such as Adagio, Miscanthus Gracillimus, Karley Rose, Pink Muhly, and Karl Foerster can be planted anywhere from 2.5 feet to 3 feet apart.
Plant grasses in holes a couple of inches deeper and wider than their original containers. Place so that the plant sits about 1 to 2 inches above the ground. Add aged manure or compost at planting and put down a thick layer of mulch in fall.
The first few weeks are critical with grasses. Check them daily for the first several weeks. If the soil at the base of the clumps is dry, water them. One long dry day can cause them to die at this stage.
Depending on the environment/weather, they may need to be watered daily or every other day during this time. Each situation will be different, so you will need to use your own judgment on this. Once they are nicely established, at about 4 to 6 weeks, then water weekly throughout the first growing season as necessary so that they don’t dry out during this period. After one year, they require little watering.
If applying aged manure or compost, fertilizing isn’t necessary for ornamental grasses. They are generally happy without fertilizing. In fact, too much nitrogen in the soil can lead to problems with them. If you must, in spring apply a slow release of 3-1-2 ratios once.
Ornamental grasses provide lots of texture and interest during the fall and winter and the birds often eat the seeds from the plumes. In late winter, usually February to March, they can be pruned back to a few inches above the ground by using shears or a weed eater. As they age, they may become thinner. At this time, they can be dug up and divided, then replanted or tossed away.