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Protocol Information

Carol and Jerry Baskin
University of Kentucky
University of Kentucky
Lexington, Kentucky 40506-0225

Family Scientific Name: Scrophulariaceae
Family Common Name: Figwort family
Scientific Name: Penstemon grandiflorus Nutt.
Common Name: Large beardtongue
Species Code: PENGRA
General Distribution: P. grandiflorus is found from Indiana west to North Dakota and Wyoming and south to central Texas. it grows is sandy and loamy soils in prairies.
Propagation Goal: Plants
Propagation Method: Seed
Product Type: Container (plug)
Propagule Processing: Seeds exhibit physiological dormancy.
Pre-Planting Treatments: Seeds are placed in cold moist stratification for 105 days. Germination occurs at 33D/19N C alternating temperature cycle.
References: Salac, S. S. and Hesse, M. C. (1975). Effects of storage and germination conditions on the germination of four species of wild flowers. J. Amer. Soc. Hort. Sci. 100, 359-361.
Table 10.22 In: Baskin, C.J. and Baskin, J.M. Seeds: Ecology, Biogeography and Evolution in Dormancy and Germination, Academic Press, 1998. Chapter 10: A Geographical Perspective on Germination Ecology: Temperate and Arctic Zones, pages 331 to 458.

Baskin, Carol C.; Baskin, Jerry M. 2002. Propagation protocol for production of container Penstemon grandiflorus Nutt. plants; University of Kentucky, Lexington, Kentucky. In: Native Plant Network. URL: http://www.nativeplantnetwork.org (accessed 3 September 2015). Moscow (ID): University of Idaho, College of Natural Resources, Forest Research Nursery.