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Wild Blue Phlox, Sweet William Phlox
Scientific Name: Phlox divaricata L.
Family: Polemoniaceae
Wild Blue Phlox, Sweet William Phlox (Phlox  divaricata)
Phlox divaricata, Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 56.
Recommended Temperature Zone:
sunset: 1-17
USDA: 3-9

Sun Exposure: Full sun or light shade

Origin: Eastern North America, in open woods and slopes

Growth Habits: Semi-evergreen perennial, loose creeping mats, 10 to 20 inches tall (25-50 cm); leaves up to 2 inches long (5 cm)

Watering Needs: Moderate water, prefers moist soil, with high organic matter content

Propagation: Spreads by creeping rhizomes, roots at the stem nodes, propagates by seeds, cuttings, division

Phlox divaricata in Curtis Botanical Magazine

Cultural Practices:
Sensitive to powdery mildew.

Blooming Habits:
Lavender to blue to purple to white flowers, glabrous tube up to 0.8 inch long (2 cm), 1 inch wide (2.5 cm), in late spring to early summer.

Fruiting Habits:

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