Companion plants for Brunnera
Brunnera blooms from April through May. It wants part shade and moderate water. The 8 companion pairings below each state why the pairing works.
Taking over as Brunnera finishes

Rosebay Rhododendron
Shares part shade and moderate water; blooms in early summer as this one finishes; both offer pollinator forage, in different months; evergreen, so the bed keeps its shape through winter.

American Wintergreen
Shares part shade and moderate water; blooms in early summer as this one finishes; both offer pollinator forage, in different months; evergreen, so the bed keeps its shape through winter.

Northern Sea Oats
Shares part shade and moderate water; blooms in midsummer, extending the bed's season; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.

Zigzag Goldenrod
Shares part shade and moderate water; blooms in late summer, extending the bed's season; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.

Mountain Laurel
Shares part shade and moderate water; overlaps, then carries the display into early summer; evergreen, so the bed keeps its shape through winter; both offer pollinator forage.

Blue Wood Aster
Shares part shade and moderate water; blooms in late summer, extending the bed's season; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.

Black Cohosh
Shares part shade and moderate water; blooms in early summer as this one finishes; both offer pollinator forage, in different months; taller at 5 ft, for the layer behind it.

Wishbone Flower
Shares part shade and moderate water; blooms in early summer as this one finishes; both offer pollinator forage, in different months; lower at 10 in, for the front of the border.