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

Foxglove
Shares part shade and moderate water; blooms in late spring as this one finishes; both offer pollinator forage, in different months; taller at 4 ft, for the layer behind it.

Lobelia
Takes part sun to part shade and moderate water; blooms in late spring as this one finishes; both offer pollinator forage, in different months; lower at 8 in, for the front of the border.

Dead Nettle
Shares part shade and moderate water; blooms in late spring as this one finishes; lower at 8 in, for the front of the border; both offer pollinator forage, in different months.

Jacob's Ladder
Shares part shade and moderate water; blooms in late spring as this one finishes; both offer pollinator forage, in different months.

Beautyberry
Takes part sun to part shade and moderate water; blooms in early summer, extending the bed's season; both offer pollinator forage, in different months; taller at 5 ft, for the layer behind it.

Japanese Stewartia
Takes part sun to part shade and moderate water; blooms in early summer, extending the bed's season; both offer pollinator forage, in different months; its white flowers settle the pink.

Rhododendron
Shares part shade and moderate water; blooms in late spring as this one finishes; both offer pollinator forage, in different months; taller at 6 ft, for the layer behind it.

Wishbone Flower
Shares part shade and moderate water; blooms in early summer, extending the bed's season; both offer pollinator forage, in different months; lower at 10 in, for the front of the border.