Kratsch, H.; Hunter, G. 2009. Firecracker penstemon in the landscape. Fact Sheet 13. Logan, UT: Utah State University Extension, Center for Water Efficient Landscaping. 3 p.

Kratsch, H.; Hunter, G. 2009. Firecracker penstemon in the landscape. Fact Sheet 13. Logan, UT: Utah State University Extension, Center for Water Efficient Landscaping. 3 p.