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Perennial · Polemoniaceae Draft — unreviewed

Woodland phlox

Phlox divaricata L.

Also called woodland phlox, wild blue phlox.

Low woodland phlox with loose clusters of fragrant lavender-blue flowers in mid-spring, blooming before the tree canopy closes. Creeping stems knit into an informal carpet under deciduous trees.

Size over time

Typical landscape size 0.3–0.4 m (10–16 in) tall and 0.3–0.5 m (12–18 in) wide; medium growth, about 3 years to maturity. Intermediate sizes use the planner’s growth curve (k = 0.25) from the #1 install size.

00.511.52mPlanting0.2 × 0.3 mYear 30.3 × 0.3 mYear 100.3 × 0.4 mMature0.3 × 0.4 m

Bloom

Lavender-blue flowers, Apr–May (northern-hemisphere months; timing shifts with region and season).

Bloom calendar: months each plant is in bloom
PlantJFMAMJJASOND
Woodland phlox : Apr–May

Design notes

  • Pair with ferns, sedges or wild ginger to cover the gap after it goes semi-dormant in summer heat.
  • Deer and rabbits browse it; protect young plants near woods edges.
  • Shear lightly after bloom to tidy; powdery mildew is less of a problem in shade with good air movement.

Regions

Native range: Eastern North America, from Quebec south to northern Florida and west to Texas.

Native to these OpenLandscape3D pilot regions:

Native status describes where the species occurs naturally. It is not a promise that it suits a particular garden; site conditions decide that.

In the guides

Woodland phlox comes up in these guides:

Related plants

Try Woodland phlox in a plan

Opens your own copy of a finished sample garden in the planner with Woodland phlox ready to place; the planner checks it against that garden’s zone, light and moisture.

Plan with Woodland phlox

Place it in a design, check it against your zone, light and moisture, and see it at year three and year ten.