Companion plants for Northern Sea Oats
Northern Sea Oats blooms from July through September. It wants part shade and moderate water. The 8 companion pairings below each state why the pairing works.
Blooming before Northern Sea Oats opens

Pansy
Takes part sun to part shade and moderate water; blooms in early spring, before this one opens; lower at 8 in, for the front of the border; purple against orange, for contrast.

Primrose
Shares part shade and moderate water; blooms in early spring, before this one opens; lower at 8 in, for the front of the border; yellow sits close to orange on the wheel.

Foam Flower
Shares part shade and moderate water; blooms in mid spring, before this one opens; lower at 12 in, for the front of the border; both are North American natives.

Snowdrop
Shares part shade and moderate water; blooms in late winter, before this one opens; low at 5 in, to carpet the ground beneath; its white flowers settle the orange.

Flowering Dogwood
Shares part shade and moderate water; blooms in mid spring, before this one opens; stands well above at 23 ft, a canopy to plant beneath; both are North American natives.

Windflower
Takes part sun to part shade and moderate water; blooms in early spring, before this one opens; low at 6 in, to carpet the ground beneath; blue against orange, for contrast.
Blooming alongside

Dead Nettle
Shares part shade and moderate water; opens in late spring and overlaps into this one's season; lower at 8 in, for the front of the border.

Bacopa
Takes part sun to part shade and moderate water; low at 6 in, to carpet the ground beneath; overlaps, then carries the display into mid fall; its white flowers settle the orange.