Wild Blue Phlox, Phlox divaricata

Wild Blue Phlox

Phlox divaricata

Sun Shade:
Bloom Time: Late Spring/Early Summer
Zones: 3, 4, 5
Soil Conditions: Clay, Loam, Sand
Soil Moisture: Moist, Medium
Color: Blue
Fragrance: Yes
Height: 1 - 2 feet
Spacing: 1 foot


Wild Blue Phlox (Phlox divaricate) is a spreading, native wildflower which forms mats of foliage with stems typically reaching 12-15 inches tall. As the common name suggests, this is a woodland species which occurs in rich woods, fields and along streams. Loose clusters of slightly fragrant, tubular, lilac to rose to blue flowers (to 1.5 inches wide) with five, flat, notched, petal-like lobes that appear at the stem tips in spring. Stems are both hairy and sticky. Lance-shaped to elliptic leaves (to 2 inches long). The blooming period occurs from mid-spring to early summer and lasts about a month. Each flower is replaced by an ovoid seed capsule containing several small seeds. The root system produces stolons that establish infertile shoots. Small colonies of clonal plants are often formed by means of these stolons. Can form large colonies over time as leafy shoots spread along the ground rooting at the nodes.

Habitats include moist to slightly dry deciduous woodlands and areas along woodland paths. In young woodlands that have sprung up where the original woodland was destroyed by plowing or heavy construction, this species is usually absent.

Best grown in humusy, medium moisture, well-drained soil in part shade to full shade. Prefers rich, moist, organic soils. Appreciates a light summer mulch which helps retain moisture and keep roots cool.

Plant Notes and Herbal Uses
  Apply light summer mulch which helps retain moisture and keep roots cool.Can form large colonies over time.
  Powdery mildew can be a serious problem.
  Watch out for rabbits.
Further Information

 Wisconsin Fruit Trees
 Wisconsin Edible Berry Shrubs
 Widsconsin Edible Plants-Eat On The Wild Side
 8 Dandelion Recipes
 Wisconsin Native Plant Nurseries

Bees flying footer graphic