Thanks for the photo - it always makes plant ID much easier. The mystery plant is a Brunnera and this variety is unusual with solid green leaves. Most of the newer brunnera have silver stripes or pale silver foliage. Brunnera is a perennial that does well in the shade and after the blue spring blooms fade the leaves grow larger and create a lovely foliage plant similar to hosta - but more slug resistant. Keep growing, Marianne Binetti