Woodland Phlox ‘Blue Moon’(Phlox divaricata) Phlox Family Wild Blue Phlox is a showy, fragrant, and evergreen wildflower that makes an excellent addition to the woodland garden. Sky-blue flowers start blooming in April for about 3-4 weeks. Flowers have tubular throats that make them a favorite early nectar source for hummingbirds, butte