Raised in Atlanta, Georgia, Su earned a BA from Radcliffe College of Harvard University and an MFA from the University of Virginia. She is the author of the poetry collections Middle Kingdom (1997), Sanctuary (2006), Having None of It (2009), and Living Quarters (2015). Her awards include a National Endowment for the Arts Fellowship and residencies at the Fine Arts Works Center and The Frost Place.
 
Commenting on her work for the National Endowment for the Arts website, she said that in terms of subject matter, she prefers “the daily to the exotic.” In Having None of It, this preference is evident in the focus on balancing motherhood and professional work.
 
Su’s poems have appeared in the anthologies The New American Poets (2000), The Pushcart Prize XXIV (2000), and Asian-American Poetry: The Next Generation (2004).
 
She teaches at Dickinson College in Carlisle, Pennsylvania.