Via LLRX – Climate change is shifting the zones where plants grow – With the arrival of spring in North America, many people are gravitating to the gardening and landscaping section of home improvement stores, where displays are overstocked with eye-catching seed packs and benches are filled with potted annuals and perennials. But some plants that once thrived in your yard may not flourish there now. To understand why, Dr. Matt Kasson looks to the U.S. Department of Agriculture’s recent update of its plant hardiness zone map, which has long helped gardeners and growers figure out which plants are most likely to thrive in a given location.