Phlox paniculata (Garden Phlox or Summer Phlox) is a perennial native to central and eastern United States. Garden Phlox produces large clusters of fragrant five-petal blooms throughout the summer. It prefers full sun and moist, well-drained soil. Deadheading Phlox paniculata throughout the season will encourage reblooming and prevent this perennial from self-sowing. Garden Phlox needs adequate air flow to prevent powdery mildew, so provide enough space to accommodate the plant at its mature size. Phlox is attractive to butterflies and hummingbirds and can be grown under black walnut trees. Hardy to zones 4-9.