As Iowans, we all know the signs that spring is finally here.

It’s the beautiful flowering crabapple and redbud trees blooming all over the state. It’s the locally-grown asparagus, and maybe even a few morel mushrooms, showing up at farmers markets and stores.

And we know spring has arrived because graduation announcements are finding their way into our mailboxes, or these days into our email inboxes.

But my favorite signals of spring are the tulip festivals in Pella...