Spectacle: Philadelphia Flower Show By Michael Persico on March 4, 2010 More than 250,000 visitors are expected this week at the Pennsylvania Convention Center for the annual Philadelphia International Flower Show, a storied tradition that continues to stay relevant thanks to the likes of Philly’s own Moda Botanica, which has taken the show by storm again with its gritty, urban designs and displays. The show runs through Sunday, and here’s a glimpse of some of the early highlights.