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

Candytuft
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; evergreen, so the bed keeps its shape through winter; lower at 10 in, for the front of the border.

Bergenia
Takes full sun to part sun and moderate water; blooms in mid spring, before this one opens; evergreen, so the bed keeps its shape through winter.

Rosemary
Shares full sun and low to moderate water; blooms in early spring, before this one opens; evergreen, so the bed keeps its shape through winter; taller at 3.3 ft, for the layer behind it.
Taking over as Daylily finishes

Perennial Sunflower
Shares full sun and moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 4.9 ft, for the layer behind it.

Fountain Grass
Shares full sun and low to moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 3.3 ft, for the layer behind it.

Pampas Grass
Shares full sun and low to moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 8.2 ft, for the layer behind it.

Switchgrass
Shares full sun and low to moderate water; overlaps, then carries the display into mid fall; its seed heads stand through winter, for structure and the birds; taller at 4.9 ft, for the layer behind it.
Blooming alongside

Arborvitae
Shares full sun and moderate water; evergreen, so the bed keeps its shape through winter; stands well above at 20 ft, a canopy to plant beneath.