Link to solution for erosion using native grasses & plants. https://www.wildflower.org/expert/show.php?id=3046

I’m not an expert and have no experience growing the Vetiver grass. I have found these included links below might help in your decision. Various sellers claims from the Internet, it’s like a ‘Holy Grail” ie: ‘Vetiver is a clumping type grass not running type and the ‘Sunshine’ is a non-sterile cultivar. https://libres.uncg.edu/ir/asu/f/Bowen,%20Christine%20Spring%202017.pdf ” Other than the lack of seed set, there are no morphological differences between the sterile and non-sterile variety making it difficult to identify different varieties. There is a possibility that a non-sterile variety could enter the U.S. unintentionally allowing the uncontrollably spread as an invasive weed.” You could look into other options in using native grasses & plants from the second included link. Best wishes!