The best selection of Woodland Phlox, in our opinion, is this lovely cultivar introduced by Bill Cullina, formerly of The New England Wildflower Society and the Coastal Maine Botanical Garden, and now Director of Horticulture at the Morris Arboretum Abundant deep periwinkle blue flowers on 12″ stems perfume the May garden, and when planted en masse create ethereal drifts. It makes an excellent companion for woodland poppies and late blooming Narcissus.
‘Blue Moon’ grows best in light shade in a rich soil that is moist yet well drained, forming clumps 2-3′ across. After the blossoms fade, cut back the spent flowering stems for a neater appearance. It is hardy in zone 4-8.