Companion plants for Calla Lily
Calla Lily blooms from June through August. It wants part sun and high water. The 8 companion pairings below each state why the pairing works.
Blooming before Calla Lily opens

Azalea
Takes part sun to part shade and moderate to high water; blooms in mid spring, before this one opens; evergreen, so the bed keeps its shape through winter; taller at 4 ft, for the layer behind it; they only overlap in zones 8 to 9.

Camellia
Takes part sun to part shade and moderate to high water; blooms in midwinter, before this one opens; evergreen, so the bed keeps its shape through winter; taller at 6.5 ft, for the layer behind it; they only overlap in zones 8 to 9.

Ranunculus
Takes full sun to part sun and moderate to high water; blooms in mid spring, before this one opens; a soft color beside the white.

Flowering Dogwood
Takes part sun to part shade and moderate to high water; blooms in mid spring, before this one opens; its white flowers settle the white; they only overlap in zones 8 to 9.
Taking over as Calla Lily finishes

Joe Pye Weed
Takes full sun to part sun and high water; overlaps, then carries the display into early fall; its seed heads stand through winter, for structure and the birds; taller at 6 ft, for the layer behind it; they only overlap in zones 8 to 9.

Perennial Sunflower
Takes full sun to part sun and moderate to high water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 5 ft, for the layer behind it; they only overlap in zones 8 to 9.

Ironweed
Takes full sun to part sun and moderate to high water; overlaps, then carries the display into early fall; its seed heads stand through winter, for structure and the birds; taller at 5 ft, for the layer behind it; they only overlap in zones 8 to 9.
Blooming alongside

Gardenia
Shares part sun and high water; opens in late spring and overlaps into this one's season; evergreen, so the bed keeps its shape through winter; taller at 4 ft, for the layer behind it.