I am trying to do some upgrading in my yard,
and it seems that different websites, may have different zonings for the plants, question is where do I find the zoning information for my territory and should they all be the same with all seed and plant companies.
ask any local garden center. the zone maps are varied slightly by enthusiast-plant outfits like the rose growers, but official zone info is set by the USDA and provided through state extention services.
sig: if this is a new economy, how come they still want my old-fashioned money?
Here is a link to the map, but there are micro zones that can impact your actual zone. Being on the western side of a mountain can give you a different weather pattern than being on the eastern side of the same mountain. But it will give you the general idea.
Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.
My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
Some catalogue nurseries might have different subzones, such as 5a or 5b. If you follow the guidelines of Sparky's link and ID your specific zone you should be good.
Generally as well, some plants which thrive in warmer zones may be adaptable to colder zones if you have mild winters and protect the plants (specifically roses). I.e., they're marginally adaptable to these colder zones.
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