Phlox paniculata, Garden Phlox

Garden phlox
Phlox paniculata 

Hardiness: Zones 4 to 8
Plant type: Herbaceous perennial
Height: 2- 4'
Spread: 2- 3'
Sun: Part shade to full sun
Water: Medium
Bloom time: July to September
Bloom color: Lavender-pink
Soil: Moist, organically rich soils, loamy, average well-draining soils, neutral (≈7), acid (<7pH).

Notes: Remove faded flower panicles to prolong bloom period and to prevent unwanted self-seeding.

More information on this plant here.