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

Castle Rouge Blue Holly
Shares full sun and moderate water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; evergreen, so the bed keeps its shape through winter.

Indian Hawthorn
Shares full sun and moderate water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; evergreen, so the bed keeps its shape through winter.

Red Robin Photinia
Shares full sun and moderate water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; evergreen, so the bed keeps its shape through winter.

Candy Cloud Pink Phlox
Shares full sun and moderate water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; evergreen, so the bed keeps its shape through winter.

Decadence Lemon Meringue False Indigo
Shares full sun and moderate water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; its seed heads stand through winter, for structure and the birds.

Rosemary
Shares full sun and low to moderate water; blooms in early spring, before this one opens; both are strong pollinator plants, and they feed in different months; evergreen, so the bed keeps its shape through winter.
Taking over as Celosia finishes

Swamp Sunflower
Shares full sun and moderate water; blooms in mid fall as this one finishes; both are strong pollinator plants, and they feed in different months; its seed heads stand through winter, for structure and the birds.

Pink Muhly Grass
Shares full sun and low to moderate water; overlaps, then carries the display into late fall; both are strong pollinator plants; its seed heads stand through winter, for structure and the birds.