Companion plants for Rose of Sharon
Rose of Sharon blooms from July through September. It wants full sun and moderate water. The 8 companion pairings below each state why the pairing works.
Blooming before Rose of Sharon opens

Sea Thrift
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; low at 8 in, to carpet the ground beneath; evergreen, so the bed keeps its shape through winter.

Tulip Tree
Shares full sun and moderate water; blooms in late spring, before this one opens; both offer pollinator forage, in different months; stands well above at 66 ft, a canopy to plant beneath.

Pansy
Takes full sun to part sun and moderate water; blooms in early spring, before this one opens; low at 8 in, to carpet the ground beneath; both offer pollinator forage, in different months.

Chives
Shares full sun and moderate water; blooms in late spring, before this one opens; both offer pollinator forage, in different months; low at 12 in, to carpet the ground beneath.

Candytuft
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; low at 10 in, to carpet the ground beneath; evergreen, so the bed keeps its shape through winter.

Hyacinth
Shares full sun and moderate water; blooms in early spring, before this one opens; low at 10 in, to carpet the ground beneath; both offer pollinator forage, in different months.

Sage
Shares full sun and low to moderate water; blooms in late spring, before this one opens; both offer pollinator forage, in different months; lower at 1.6 ft, for the front of the border.
Blooming alongside

Aster
Shares full sun and moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; both offer pollinator forage.