Jensen, S. 2007. Propagation protocol for production of container (plugs) Agoseris heterophylla (Nutt.) Greene plants. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://npn.rngr.net/propagation/protocols [Accessed 2020 November 20].

Jensen, S. 2007. Propagation protocol for production of container (plugs) Agoseris heterophylla (Nutt.) Greene plants. Native Plant Network. U.S. Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. http://npn.rngr.net/propagation/protocols [Accessed 2020 November 20].