What a treat to have already installed a garden this season! These native plants will thrive, and as spring comes and the soil warms, their roots will go deep.
All plants used in this landscape are indicated as being native to Illinois except the Allegheny Spurge which tends to be from farther east, and the Amelanchier, which is a cultivar, and the two Thuja cultivars. No other cultivars, and no exotic plants were used.
Here is more insight into this project.