At Habersham Gardens nursery in Atlanta, a number of plants that once would have required special care to survive in the South are now standard fare for customers.

• “我正在写一篇杜鹃方面的专栏文章。我想，我即将做出的结论只可能是，不栽种杜鹃类植物。我们这地区温度变高了，不再适合杜鹃的生长。”