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

Grape Hyacinth
Shares full sun and low water; blooms in early spring, before this one opens; both offer pollinator forage, in different months; lower at 8 in, for the front of the border.

Crocus
Shares full sun and low water; blooms in late winter, before this one opens; both offer pollinator forage, in different months; lower at 4 in, for the front of the border.

Hyacinth
Shares full sun and low to moderate water; blooms in early spring, before this one opens; both offer pollinator forage, in different months; lower at 10 in, for the front of the border.
Taking over as Catmint finishes

Goldenrod
Shares full sun and low water; overlaps, then carries the display into mid fall; both are strong pollinator plants; its seed heads stand through winter, for structure and the birds.

Fountain Grass
Shares full sun and low 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.
Blooming alongside

Globe Thistle
Shares full sun and low water; both are strong pollinator plants; its seed heads stand through winter, for structure and the birds; taller at 3.3 ft, for the layer behind it.

Blazing Star
Shares full sun and low water; both are strong pollinator plants; its seed heads stand through winter, for structure and the birds; purple sits close to blue on the wheel.

Lavender
Shares full sun and low water; both are strong pollinator plants; evergreen, so the bed keeps its shape through winter; purple sits close to blue on the wheel.