When you’re driving through Wisconsin, you might pass the time by trying to spot out-of-state license plates or unusual billboards. Some Wisconsinites, however, are on the lookout for wild veggies, specifically, asparagus. But why is asparagus so prominent along the roadsides in Wisconsin, and how did it get there? WPR’s Sarah Lehr digs into the answer as part of WPR’s WHYsconsin project.