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

Creeping Phlox
Shares full sun and low water; blooms in mid spring, before this one opens; low at 6 in, to carpet the ground beneath; both are strong pollinator plants, and they feed in different months.

White Clover
Shares full sun and low to moderate water; blooms in late spring, before this one opens; low at 4 in, to carpet the ground beneath; both are strong pollinator plants, and they feed in different months.

Leadplant
Shares full sun and low water; blooms in early summer, before this one opens; both are strong pollinator plants, and they feed in different months; lower at 2.5 ft, for the front of the border.

Chick Charms Berry Blues Hens & Chicks
Shares full sun and low water; blooms in midsummer, before this one opens; low at 4 in, to carpet the ground beneath; both are strong pollinator plants, and they feed in different months.

Thyme
Shares full sun and low water; blooms in late spring, before this one opens; low at 6 in, to carpet the ground beneath; both are strong pollinator plants, and they feed in different months.

Bachelor's Button
Shares full sun and low water; blooms in late spring, before this one opens; both are strong pollinator plants, and they feed in different months; lower at 2.5 ft, for the front of the border.

Toyon
Shares full sun and low water; blooms in early summer, before this one opens; both are strong pollinator plants, and they feed in different months; taller at 13 ft, for the layer behind it.
Blooming alongside

Crocus
Shares full sun and low water; blooms in late winter, extending the bed's season; low at 4 in, to carpet the ground beneath; both offer pollinator forage, in different months.