Pink tickseed, Pink threadleaf coreopsis
Coreopsis rosea

Hardiness: Zones 3 to 8
Plant type: Herbaceous Perennial
Height: 1- 2'
Spread: 1.5- 2.5'
Sun: Full sun
Water: Medium
Bloom time: June to September
Bloom color: Pale pink rays with yellow disks
Soil: Moist, organically rich soils, Loamy, average well-draining soils, Neutral (≈7)

Other notes: Attracts butterflies, birds enjoy the seeds.

More information on this plant here.