P. rigida si found in the southeastern United States.
plants
seed
Container (plug)
0
Seeds exhibit physiological dormancy.
Seeds are cold stratified for 30 to 90 days and germinate at 21 C.
Barton, L. V. (1930). Hastening the germination of some coniferous seeds. Amer. J. Bot. 17, 88-115. In: Baskin, C. and Baskin, J. Table 10.15 Chapter 10. Seeds: Ecology, Biogeography and Evolution of Dormancy and Germination. Academic Press, 1998. 666 pages.
Baskin, Jerry M.; Baskin, Carol C.. 2002. Propagation protocol for production of Container (plug) Pinus rigida P. Mill. plants University of Kentucky Lexington, Kentucky. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/12/22). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.