Propagation can be accomplished by allowing the seeds to mature and fall naturally or by plant division.
Chasmanthium latifolium is widely used in gardens throughout the United States. They seed and spread readily if the spikelets are not removed before the seeds mature. It should be fertilized once a year, preferably with a slow release 3-1-2 ratio. Since it may take up to three years for the plant to reach its optimum growth, new plantings should be spaced about 2 feet apart. The new plants should be given a sufficient amount of water throughout the first growing season. One inch of water per week is recommended, perhaps more during the dry, hot days of summer. Mulch before the winter and mow the grass in the early spring.
Adaptation: It inhabits areas along streams and water banks, shaded slopes and bottomland hardwoods. It flowers from June to October and is found in hardiness zones 4-10. In Texas, this species is very common on loamy, terrace soils adjacent to creeks, bayous and rivers in eastern Texas, particularly under a hardwood forest canopy. It becomes less common westward, although it is found under favorable conditions in the Edwards Plateau, Rio Grande Plains, and Southern Rolling Plains. It is quite common in river bottoms of the Western Gulf Coast Prairie. An abundance of Chasmanthium latifolium is usually a good indicator of a Class I or II soil; though, it will grow on wet natured clayey soils. It is never found on droughty sites. Some of the literature suggests that it is found in marshes and mud flats. However, stress appears to limit the colonies to 1-3 plants on wet sites, rather than the 10-30 plant colonies commonly found on better-drained sites.
General: There are 5-6 species of Chasmanthium in the U.S. and three in Texas. All are generally associated with forested ecosystems, but none resemble Chasmanthium latifolium. A similar species with regards to shade tolerance and vegetative growth habits, is savanna panic grass (Phanopyrum gymnocarpon). Older references refer to this plant as Panicum gymnocarpon. Phanopyrum occurs on very wet (ponded) sites and the inflorescence is completely different. Virginia wildrye (Elymus virginicus) in east Texas and Canada wildrye (Elymus canadensis) further west, commonly occupies similar forested sites but the seed head remains upright and the leaves of wildrye are clustered much more towards the base.
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