First, I must correct a statement I made. Midlothian is not "smack dab" in the middle between Dls & FtW, as Arlington is. It's "smack dab" in the middle of the division of soil, between black and red. As I recall, Arlington was red sandy, and that's only about 20 miles from me. So in this area of Texas, there are many different types of soil - all within a few miles of each other. That makes it very confusing when discussing what plants do best in "our individual gardens". Rosemary is an example. I see it growing all around, but for some strange reason, doesn't grow for me. I'm still trying different varieties and placing them in different locations. What I am further stating about the "zones", whether cold or warm or horizontal or vertical - is that the maps are too small to get an exact location. The zone maps don't show towns, etc. And if as you stated, a plant will grow in 8b but not 8a, then it becomes critical for us to know the exact location of our town on that map. Does anyone know how to get those maps big enough and showing towns, roads, etc.?