America’s oldest and largest flower show is back this weekend. The 2026 Philadelphia Flower Show is paying homage to America’s 250th birthday through the theme “Rooted: Origins of American Gardening.” Philadelphia’s flower show started nearly 200 years ago in 1829. Today, it’s the nation’s oldest and longest-running show, rooted in tradition. ndementrinews phsgardening robertsonsflowers #philadelphia #philadelphiaflowershow #flowershow #philly #phs