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

Sneezeweed
Takes full sun to part sun and moderate water; blooms in midsummer as this one finishes; taller at 3.3 ft, for the layer behind it; both offer pollinator forage, in different months.

False Sunflower
Takes full sun to part sun and moderate water; blooms in midsummer as this one finishes; taller at 3.9 ft, for the layer behind it; both offer pollinator forage, in different months.

Joe Pye Weed
Takes full sun to part sun and moderate to high water; blooms in midsummer as this one finishes; stands well above at 5.9 ft, a canopy to plant beneath; both offer pollinator forage, in different months.

Sunflower
Takes full sun to part sun and moderate water; blooms in midsummer as this one finishes; stands well above at 6.6 ft, a canopy to plant beneath; both offer pollinator forage, in different months.

Northern Sea Oats
Takes part sun to part shade and moderate water; blooms in midsummer as this one finishes; taller at 3.3 ft, for the layer behind it; its seed heads stand through winter, for structure and the birds.

Summersweet
Takes part sun to part shade and moderate to high water; blooms in midsummer as this one finishes; stands well above at 5.9 ft, a canopy to plant beneath; both offer pollinator forage, in different months.

Rose of Sharon
Takes full sun to part sun and moderate water; blooms in midsummer as this one finishes; stands well above at 8.2 ft, a canopy to plant beneath; both offer pollinator forage, in different months.

Feather Reed Grass
Takes full sun to part sun and moderate water; overlaps, then carries the display into late summer; stands well above at 4.9 ft, a canopy to plant beneath; its seed heads stand through winter, for structure and the birds.