Companion plants for Cosmos
Cosmos blooms from June through October. It wants full sun and low water. The 8 companion pairings below each state why the pairing works.
Blooming before Cosmos opens
Rock Cress
Shares full sun and low water; blooms in mid spring, before this one opens; low at 4 in, to carpet the ground beneath; both offer pollinator forage, in different months.
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.
Crocus
Shares full sun and low water; blooms in late winter, before this one opens; low at 4 in, to carpet the ground beneath; both offer pollinator forage, in different months.
Grape Hyacinth
Shares full sun and low water; blooms in early spring, before this one opens; lower at 8 in, for the front of the border; both offer pollinator forage, in different months.
Rosemary
Shares full sun and low water; blooms in early spring, before this one opens; both are strong pollinator plants, and they feed in different months; evergreen, so the bed keeps its shape through winter.
Flowering Crabapple
Shares full sun and low to moderate water; blooms in mid spring, before this one opens; both are strong pollinator plants, and they feed in different months; taller at 20 ft, for the layer behind it.
Blooming alongside
Sea Thrift
Shares full sun and low water; opens in mid spring 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.
Thyme
Shares full sun and low water; opens in late spring and overlaps into this one's season; low at 6 in, to carpet the ground beneath; both are strong pollinator plants.