Switchgrass is a robust perennial grass. It is considered one of the four highly desirable tall grasses along with little bluestem, big bluestem, and indian grass. Switchgrass provides nutritious and palatable grazing for livestock and good forage. Switchgrass is utilized by birds both as food from seeds and nesting cover. Switchgrass is a decreaser in long-term heavily grazed pastures. Blackwell is a variety of switchgrass that is more successful in dryer parts of Texas and grows 3 to 4 feet tall.
(From Range Plants of North Central Texas - A Land user's Guide to Their Identification ,Value and Managment, 2014, by Ricky J. Linex, USDA-Natural Resources Conservation Service.)
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