Well, I was meaning about any size cactus that is at least 3 to 4 feet tall and does not flop over (grows straight up, with a straight trunk) does not have to be nearly as thick as a saguaro, but I would like it more than 2 to 3 inches thick. I don't want the pad look of a prickly pear cactus. Thanks.

I don't think you will find a true citrus which is hardy enough to survive zone 7 low temps. Poncirus trifoliata will survive and make fruit. It is a first cousin to true citrus but the fruit is bitter and all seeds. Sasumas/Mandarins were killed back on the Gulf coast during the January 1982 freeze and many otheres were killed during the March 1993 snowstorm of the century. In Alabama, we had a very mild winter of 2005-2006 and one might have survived it. Temps only went below 20 once or twice in suburban Birmingham.

Yet why USDA does not update its own maps or make them more refined with more detail showing. I was in Bluffton, SC and it has adult old palm trees growing that would not survive in a USDA zone 8B. It must be 9A or even higher. I think it's time for USDA to review its 20 year old hardiness zone maps. Do you think it makes sense if USDA after rejecting Arborday maps review their own maps? The only reason why USDA won't I think is the artificial cloud cover they are creating and thus cooling the climate down and back to the old hardiness zones. Like this winter they created a freak snow storm in southern SC by spraying clouds, an ugly mist in the sky which lower temperatures so much that it started snowing and my palms died that would usually survive in this area. I also spent 50% more on a heating bill last winter. So I think this could be the reason why USDA won;t review their :hardiness map" because they are not sure themselves where the climate will be with all the artificial cloud cover making going on in the sky. And only a very busy person can not notice what's happening up in there. I will go South FL to make sure my palms survive. I hope no snow in SFL next winter.... ;-)

They've changed the map, cool. Thanks for the update. And in case folks want to know what zone they're in by their zip code, or download the map, here's the link... Arborday.org Zone Lookup tool Of course, hardiness zones don't tell you nearly the whole story. Like I'm in 8-9 here in the PNW, but my climate is radically different from coastal Texas. Better results comes from looking at three different zone destinctions. My "zone" above is U:8b A:2 S:5, for USDA (arborday), A for American Horticultural Society heat zone 2 which means we get about 7 days of hot weather (over 86 degrees) a year compared to Texas' 170 days, hehe, but we're both zone 8-9. A link for AHS is AHS Heat Zones And finally, I like to compare my clmiate with others so the Sunset Climate Zones, which tells me I'm closer to the United Kingdom than Texas for climate. So that allows me to order seeds from England if I so choose. Here's their website. Sunset Climate Zones Just thought I'd share more resources to add my 2 cents to Angela's great post. Here is a link that might be useful: Sinfonian's garden adventure