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A picture of a Wild Blue Phlox

Wild Blue Phlox

Phlox divaricata

Also known as

Wild Sweet William, Early-Flowering Lychnidea, Struggling Phlox, Wood Phlox, Forest Phlox, Louisiana Phlox, Blue Woodland Phlox, Woodland phlox, Blue phlox

Full Sun
Moderate care
Light watering
Frost Hardy

H5

RHS hardiness

-15°C

Minimum temperature

Expected size

Height
Spread

50cm

Max

50cm

10cm

Min

10cm

5 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Wild Blue Phlox

Phlox divaricata; Wooster Memorial Park, Wooster, Ohio; April 2016.
A photo of Wild Blue Phlox

Wild Blue Phlox Overview

This is a slow spreading species with dark green foliage and fragrant blue blooms which appear in the spring. The flowering colours will vary according to the cultivar chosen and will range from white to a deep, dark blue. These are charming perennials they are a good choice for the front of the border where their enchanting beauty won't be hidden.

Common problems with Wild Blue Phlox

How to propagate Wild Blue Phlox

Cuttings

Propagate rock and hybrids by basal cuttings from non-flowering shoots in spring or summer. Root cuttings in winter.

Seed

Species can be increased by seed in autumn or spring. Annuals can be propagated by seed in spring.

Division

P.maculata, P.paniculata and their cultivators should be propagated by division in early spring.

Special features of Wild Blue Phlox

Attracts butterflies

Attracts bees

Ground cover

Other uses of Wild Blue Phlox

Wildflower/meadow, naturaliser, edging, border, under shrubs