I have used the Deno guide for years. I have found several cases where the requirements listed were incorrect. More important, I want to point out the the UC Botanical Garden has started putting all it's historical propagation on line for pubic use. Entry of our native california collection is complete, but we probably won't finish all data because of funding. You may use it at: http://www.mip.berkeley.edu/bgpw/IndexPage.action Paul Licht, Director Univ. California Botanical Garden 200 Centennial Drive Berkeley, CA 94720 (510)-643-8999 http://botanicalgarden.berkeley.edu/