Charm City is “Gnome City” according to the lawn care website LawnStarter.
It might have started with the Buck Showalter garden gnome…
Baltimore’s interest in garden gnomes is the highest more than any other city in the U.S.
Google Trends data tracked the obsession activity for “garden gnome” from January 2004 to March 2017 and looks like it is Oriole related. The team has given away “O’s” gnomes that resemble team players. In 2015, fans received a Buck Showalter garden gnome.