Phlox divaricata 

(flox dii-vair-i-cah' tah)

Common name: Wild Blue Phlox, Wild Sweet William, Woodland Phlox

Family: Polemoniaceae, Phlox

Height x width: 12-15" x 12"

Growth rate: moderate

Foliage: opposite, sessile, ovate to lanceolate, 2" long and ½-¾" wide, viscid-pubescent stems and leaves

Flowers: blue, convolute (twirled) buds, symmetrical flowers of 5 petals united to form a trumpet-shaped corolla tube; petals notched at tips in east and not in west; spring; slightly fragrant

Hardiness: 4-7

Soil: moist, organic

Light: part to full shade, will tolerate sun in North if sufficient moisture

Pests and Problems: powdery mildew if hot and humid, also feeding from small mammals

Landscape habit, uses: shade, natural or woodland gardens, front of northern borders

Other interest: native to the eastern U.S.

Other culture: leaves drop and plants become partly dormant in dry, sun or heat

Propagation: spring division, summer tip cuttings, seeds

Related Species:

P. stolonifera, Creeping Phlox, is also native to eastern woodlands from Pennsylvania and Ohio southwards, with several commercially ornamental cultivars.

Cultivar flowers other
'Clouds of Perfume' pale blue fragrant
'Dirigo Ice' icy blue 8-12"
'Fuller's White' white 8-12"
var. laphamii dark blue 18"
var. laphamii 'Chattahoochee' lavender blue dark center, long bloom
'London Grove Blue' deep blue fragrant
'Louisiana' purple blue magenta eye

©Authored by Dr. Leonard Perry, Professor, University of Vermont as part of PSS123 course.

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