Polemoniaceae
Phlox diffusa subsp. diffusa
Phlox diffusa subsp. diffusa
Also known as Phlox azurea
Flowering Plants · Native Plants · Spreading Phlox · Groundcover · Alpine · Native · Western Us · Rock Garden · Mat-Forming · Perennial · Low Growing · Wildflower
Spreading Phlox is a low-growing, mat-forming perennial suited to rocky slopes and alpine gardens in the western United States. Plant in well-drained soil with partial shade and water regularly during the growing season, reducing frequency once established. It requires minimal fertilization and benefits from light trimming after bloom to keep the mat tidy.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Water moderately until soil is evenly moist; allow top inch to dry between waterings · Every 7-10 days
- Maintenance
- Low
- Soil
- sandy loam
- Soil pH
- 6.5–8.5
- Temperature
- -30°F to 85°F
- Cycle
- Perennial
Hardiness
USDA 4a-9b
Form & growth
Mature size and habit
- Mature height
- 6 in – 12 in
- Spread
- 18 in
- Spacing
- 12 in apart
- Growth rate
- Slow
- Root depth
- Shallow
- Flowers
- Purple
- Foliage
- Green · Coarse
Ecology & origin
Where it belongs and what it brings
- Native to
- California, Nevada, Oregon
- Attracts
- Bees, Butterflies, Moths
Sources: trefle, usda
More Phlox
Related plants from the same genus
Phlox bifida subsp. stellaria
Phlox bifida subsp. stellaria
Partial Sun · Moderate · Fast
Phlox alyssifolia subsp. collina
Phlox alyssifolia subsp. collina
Partial Sun · Moderate · Moderate
Phlox alyssifolia subsp. abdita
Phlox alyssifolia subsp. abdita
Partial Sun · Moderate · Moderate
Phlox diffusa subsp. longistylis
Phlox diffusa subsp. longistylis
Partial Sun · Moderate · Slow
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