Companion plants for Sweet William
Sweet William blooms from May through July. It wants full sun and moderate water. The 8 companion pairings below each state why the pairing works.
Taking over as Sweet William finishes

Perennial Sunflower
Shares full sun and moderate water; blooms in late summer as this one finishes; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.

Goldenrod
Shares full sun and low to moderate water; blooms in late summer as this one finishes; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.

Ironweed
Shares full sun and moderate water; blooms in late summer as this one finishes; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.

Switchgrass
Shares full sun and low to moderate water; blooms in late summer as this one finishes; both offer pollinator forage, in different months; its seed heads stand through winter, for structure and the birds.

Pampas Grass
Shares full sun and low to moderate water; blooms in late summer as this one finishes; its seed heads stand through winter, for structure and the birds; stands well above at 8 ft, a canopy to plant beneath.

Little Bluestem
Shares full sun and low to moderate water; blooms in late summer as this one finishes; its seed heads stand through winter, for structure and the birds; taller at 3.5 ft, for the layer behind it.

Love-Lies-Bleeding
Shares full sun and moderate water; overlaps, then carries the display into mid fall; both offer pollinator forage; taller at 3.5 ft, for the layer behind it.

Winterberry
Shares full sun and moderate to high water; blooms in mid fall, extending the bed's season; both offer pollinator forage, in different months; taller at 6.5 ft, for the layer behind it.