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

Kinnikinnick
Shares full sun and moderate water; blooms in mid spring, before this one opens; lower at 8 in, for the front of the border; evergreen, so the bed keeps its shape through winter.

Toyon
Shares full sun and low to moderate water; blooms in early summer, before this one opens; evergreen, so the bed keeps its shape through winter; taller at 13 ft, for the layer behind it.

Snow-in-Summer
Shares full sun and low to moderate water; blooms in late spring, before this one opens; low at 6 in, to carpet the ground beneath; evergreen, so the bed keeps its shape through winter.

American Holly
Shares full sun and moderate water; blooms in late spring, before this one opens; evergreen, so the bed keeps its shape through winter; both are North American natives.

Firecracker Penstemon
Shares full sun and low to moderate water; blooms in late spring, before this one opens; evergreen, so the bed keeps its shape through winter; lower at 2.5 ft, for the front of the border; this one spreads, so it will crowd its neighbor in time.

Adam's Needle
Shares full sun and low to moderate water; blooms in early summer, before this one opens; evergreen, so the bed keeps its shape through winter; lower at 2.5 ft, for the front of the border; this one spreads, so it will crowd its neighbor in time.
Blooming alongside

Carnival Scotch Heather
Shares full sun and moderate water; opens in early summer and overlaps into this one's season; lower at 8 in, for the front of the border; evergreen, so the bed keeps its shape through winter.

Arborvitae
Shares full sun and moderate water; evergreen, so the bed keeps its shape through winter; taller at 20 ft, for the layer behind it; both are North American natives.