Late in the season, when all else in the flower garden is losing its head, dahlias are coming on strong and having their moment–not just in backyards, but at competitions around the country. The 52nd annual American Dahlia Society national show just took place at Longwood Gardens in Pennsylvania.
Longwood’s senior horticulturalist and dahlia expert Roger Davis was heavily involved in bringing the national show to Longwood in late September, and he joined me on the show to talk all things dahlia, from ribbon-winning varieties to cultural tips for best performance, and even timely ones for off-season storage of those tubers. 
Photo by William Hill
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I get a lot of questions every year about mulch, about how to use it, when to use it, which kind to use. And...
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