![]() For a broader look at all aspects of grasses and sedges, visit our Learn section. Cold frames protect uninsulated roots in above-ground containers and prevent rain from oversoaking plants.įor more growing help, see our Container Production page. The majority of grasses, including the popular Calamagrostis, Chasmanthium, Miscanthus, Muhlenbergia, and Schizachyrium overwinter best in a cold frame. Panicum species and cultivars can do well outside of a cold frame with some monitoring.Ĭontainerized plants overwintered outside may need protection from the elements. ![]() If you overwinter outside, you may need to cover outdoor containers during rainfall or severe cold to prevent rot or damage. Annual grasses overwintered in a heated house show lush growth early. The colorful, tender Pennisetum selections are in demand early in the season-perfect for decorative containers and annual color beds. Cool season grass Festuca glauca ‘Elijah Blue’ is content in February in the Hoffman Nursery cold frames.ĭo you have a hot house? If so, get a head start with annual grasses. Do not overwater!Ĭool-season grasses work well in a cold frame or in a house kept just above freezing. Water zebra grass regularly until it’s established. Its clumping habit makes it ideal to grow as a hedge. Under the right conditions, zebra grass can reach its lush 5- to 8-foot potential with a 4- to 6-foot spread. Pay close attention to watering during the winter months. The foliage of zebra grass can add both visual interest and privacy to your landscape. Grasses are susceptible to rotting and root damage if overwatered. During winter, warm-season grasses go dormant, and cool-season plants slow their growth, so their water needs are minimal. Keep containerized grasses on the dry side. Annual grasses overwintered in a hot house allow you to have full plants with good color at the earliest possible time. You can get a head start on finishing warm-season grasses when they are overwintered in a cold frame or hot house. Cut back in late-winter or early-spring before any new growth. Highly ornamental pinkish-white clusters of flowers bloom in late-summer to fall and last throughout the winter. Long linear leaves grow up to 8 feet tall. In addition, it provides protection for roots, and helps anchor new shoots in the spring. Plant Description: Clump-forming ornamental grass with horizontal bands along the leaf blades. It helps keep a bit of interest in the landscape. Cut grasses back during winter to about 6to 12 height. Why overwinter grasses? By overwintering cool-season grasses, you’ll be ready for early-spring customers. However, it is better to leave a bit of the old growth in place.
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