Spring is upon us, and many of us spent the cold and dark days of winter planning spring and summer gardens, selecting plant varieties, acquiring seeds, and getting a head start on sowing, germinating, and nurturing the young seedlings in our windowsills and greenhouses. Nowadays, we can buy everything from seeds and trees to full-grown flowers and shrubs at nurseries around the country. But not all nurseries are alike. A surprising number of the most popular suppliers of the seeds and plants we love give little regard to environmental issues. Don’t despair! There are guidelines and best practices we would ...