Brunnera macrophylla is one of those perfect perennials for the shade garden.  In April/May they send up sprays of blue forget-me-not look alikes!

Once they finish blooming they send up a wonderful display of foliage with various colors and patterns.

The only drawback is that they like moist soil conditions.   So water frequently, and place a layer of mulch around them to help retain soil moisture and to keep the soil cool.