^Cite error: The named reference NCState was invoked but never defined (see the help page).
^Lawton, B.P. 2004. Hibiscus – hardy and tropical plants for the garden. Timber Press, Portland, OR
^Walker, J. 1999. Hibiscus. Cassel, London, England.
^Alice M. Coats, Garden Shrubs and their Histories (1964) 1992, s.v. "Hibiscus".
^USDA, NRCS (n.d.). "Hibiscus syriacus". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 20 January 2016.
^"Landscape Shrubs: Althea, Rose-of-Sharon (Hibiscus syriacus)." Cooperative Extension Service. University of Arkansas Division of Agriculture. Retrieved 10 July 2023.
^Welch, William C & Grant, Greg (2011), Heirloom Gardening in the South: Yesterday's Plants for Today's Gardens, College Station, Texas: Texas A&M University Press, p. 270, ISBN978-1-60344-213-8