Good Morning Kathy, 

Thank you for contacting the U of M Extension Service. 

Please click on the following link from the U of M Extension Yard and Garden website: 

https://extension.umn.edu/trees-and-shrubs/trees-and-shrubs-minnesota-landscapes

Here is another link about choosing evergreens: https://extension.umn.edu/trees-and-shrubs/choosing-evergreens-your-landscape

This information states: 

• Clay soil — arborvitae, Austrian pine, ponderosa pine, white fir

You might consider going to a large, local nursery to view the shrubs that are available and talk with the supplier. 

Good Luck!