Spreading Phlox

(Phlox diffusa)

Spreading Phlox (Phlox diffusa)

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Estimated Native Range
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Summary

Phlox diffusa, commonly known as Spreading Phlox, is an evergreen perennial subshrub native to alpine and subalpine areas, rocky slopes, and open, gravelly sites in the North American Pacific Coast and the Intermountain West. It forms dense mats or cushions of short, decumbent stems, typically reaching no more than 8 inches in height. The stems are usually prostrate or decumbent to erect. The flowers of Spreading Phlox are quite showy, ranging from lavender to pink, and bloom from late spring to early summer. Each flower has five petals with a tubular corolla that is fused at the base, attracting a variety of pollinators.

Spreading Phlox is valued for its vibrant floral display and its ability to thrive in challenging conditions, making it an excellent choice for rock gardens, alpine gardens, and as ground cover in xeriscaping. It is also used to stabilize slopes and prevent erosion. This plant is adapted to full sun and requires low amounts of water, preferring well-drained soils. While it is generally low-maintenance, it can be susceptible to foliar diseases in humid conditions or if overwatered.CC BY-SA 4.0

Plant Description

  • Plant Type: Herb
  • Height: 0.3-0.5 feet
  • Width: 1-2 feet
  • Growth Rate: Slow
  • Flower Color: Purple
  • Flowering Season: Spring
  • Leaf Retention: Evergreen

Growth Requirements

  • Sun: Full Sun
  • Water: Medium, High
  • Drainage: Fast

Common Uses

Bee Garden, Bird Garden, Butterfly Garden, Fragrant, Hummingbird Garden, Low Maintenance, Showy Flowers

Natural Habitat

Alpine and subalpine areas, rocky slopes, and open, gravelly sites in the North American Pacific Coast and the Intermountain West

Other Names

Common Names: Mat Phlox , Phlox Diffus

Scientific Names: Phlox diffusa , Phlox diffusa subsp. typica , Phlox douglasii var. diffusa , Phlox diffusa var. diffusa

GBIF Accepted Name: Phlox diffusa Benth.