Why aren’t mulberries sold at grocery stores?

This is just one of the stories from our “I’ve Always Wondered” series, where we tackle all of your questions about the world of business, no matter how big or small. Ever wondered if recycling is worth it? Or how store brands stack up against name brands? Check out more from the series here.

Listener Trevor Swanson asks:

Why are mulberries not sold in retail stores? We love the berries that are available, but man, mulberries are delicious, and we moved away from the neighborhood with some trees in it and we miss them!

Some people have been fortunate to grow up with mulberry trees in their neighborhood. But if you’re not familiar with the delicate, tart and sweet fruit of the mulberry tree, you’re not alone.  

While mulberry trees are easy to grow, the fruit is…