Most seed companies offer some varieties for the whole country but many specialize and choose the best varieties for a specific climate. I recommend that gardeners order from their closest seed companies when possible. Southerners from Southern seeds companies, West Coast gardeners from their region, and so on. The drop down “Other Useful Websites” under the Features section of this website contains is a very long list of seed companies and their links. In my book Edible Landscaping Melbourne there is much information about these companies and many more, including their physical addresses, phone numbers, etc.