Margaret, You have to remember that Carolyn Male is gardening in Zone 5. She is very specific in pointing that out. I am in zone 7 and find many differences. Some of the Northern favorites such as Red Penna, Sophie's Choice, and Djena Lee's Golden Girl don't do well at all for me. On the other hand, many of our Southern favorites don't impress Carolyn. Seed sources are another factor that is often not considered. I think much of the validity in her book is the fact that it is one person's findings in one location and doesn't try to generalize. Chuck