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

Summersweet
Shares part shade and moderate to high water; blooms in midsummer as this one finishes; stands well above at 6 ft, a canopy to plant beneath; its white flowers settle the purple.

Bigleaf Hydrangea
Takes part sun to part shade and moderate to high water; overlaps, then carries the display into early fall; stands well above at 5 ft, a canopy to plant beneath; blue sits close to purple on the wheel.

Beautyberry
Takes part sun to part shade and moderate water; overlaps, then carries the display into midsummer; stands well above at 5 ft, a canopy to plant beneath.

Goatsbeard
Shares part shade and moderate water; overlaps, then carries the display into midsummer; stands well above at 4 ft, a canopy to plant beneath; its white flowers settle the purple; this one spreads, so it will crowd its neighbor in time.

Ligularia
Shares part shade and moderate to high water; blooms in midsummer as this one finishes; stands well above at 4 ft, a canopy to plant beneath; orange against purple, for contrast; this one spreads, so it will crowd its neighbor in time.

Mint
Takes part sun to part shade and moderate to high water; overlaps, then carries the display into late summer; taller at 1.5 ft, for the layer behind it; echoes the purple.

Northern Sea Oats
Shares part shade and moderate water; blooms in midsummer as this one finishes; stands well above at 3.5 ft, a canopy to plant beneath; orange against purple, for contrast; this one spreads, so it will crowd its neighbor in time.
Blooming alongside

Ostrich Fern
Shares part shade and moderate to high water; stands well above at 4 ft, a canopy to plant beneath.