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The Plant Guide

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Blue phlox

Phlox divaricata and cvs.

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This spreading, semi-evergreen perennial has hairy leaves and lavender-blue to pale violet and white flowers borne in open clusters in early spring. Flowers can have notched or unnotched petal lobes. Cultivars include ‘Clouds of Perfume’ with light lavender-blue flowers; ‘Eco Texas Purple’ (dark purple with a violet eye); ‘Fuller’s White’ (white); and ‘London Grove’ (lavender-blue flowers).

Noteworthy CharacteristicsNative to Canada and the eastern U.S. Spreads by roots, creating a semi-evergreen groundcover.

CareGrow in humus-rich, fertile, moist but well-drained soil. Use in rock gardens or alpine houses, in a dry wall, or as edging.

PropagationInsert basal cuttings in spring, or take root cuttings in early autumn or winter.

ProblemsPowdery mildew, stem canker, rust, Southern blight, stem nematodes, Cercospora and Septoria leaf spots, leaf miners, and caterpillars.

  • Genus : Phlox
  • Plant Height : 1 to 3 feet
  • Plant Width : 1 to 3 feet
  • Zones : 4, 5, 6, 7, 8
  • Bloom Time : Early Spring, Spring
  • Characteristics : Fragrant Flowers
  • Uses : Ground Covers
  • Moisture : Medium Moisture
  • Light : Partial Shade
  • Plant Type : Perennials
  • Plant Seasonal Interest : Spring Interest
  • Flower Color : White
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