Habit (mature) · James St. John / Wikimedia Commons · CC BY 2.0
Limited coverage
Phlox mousse
Phlox subulata
Un couvre-sol indigène bas et tapissant qui se couvre de fleurs rose vif, lavande, blanches ou magenta au début ou au milieu du printemps — le choix classique pour les talus ensoleillés, les murs de soutènement et les rocailles, et une source précoce de nectar pour les premiers pollinisateurs de la saison.
Review: Source-backed
Climate fit: moderate (65/100)
Border
Pollinator
Filler
Light
Full sun / Part sun
Water
Moderate water
Mature size
4-6" tall · 12" apart
Hardy in zones
3a-9b
brutally cold to frosty winters
Native in Illinois
No
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Les gorges tubulaires étroites des fleurs printanières offrent une partie du premier nectar de la saison aux papillons, aux abeilles à longue trompe et aux colibris de retour.
Cold hardiness
Future
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
USDA
Published baseline for this location from 1991-2020.
Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer
Well-suited
2050
Zone 7a
Plotwright
Projected zone for this same location in 2050 (2041-2070) using SSP3-7.0 (regional rivalry).
Well-suited
In plain terms: This location is in Zone 6b today. Its hardiness profile is cold winters, and coldest nights are typically around -3°F. By 2050, the projected hardiness zone is Zone 7a based on SSP3-7.0 (regional rivalry). That is a +0.5-zone shift from Zone 6b to Zone 7a by 2050.
✓
Well-suited today and still thriving in 2050.
Heat tolerance
Future
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...
Where this plant fits
Suitable across 41 ecoregions — 40 climate-resilient through 2070 · 1 suited today. Best matches first.
Appalachian mixed mesophytic forests
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Appalachian-Blue Ridge forests
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Arizona Mountains forests
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Atlantic coastal pine barrens
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Blue Mountains forests
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Canadian Aspen forests and parklands
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Central Pacific Northwest coastal forests
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Central Tallgrass prairie
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Central-Southern Cascades Forests
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Chilean Matorral
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Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Phlox mousse (Phlox subulata). Retrieved 2026, June 13, from https://plotwright.garden/plants/phlox-subulata
Sources for every fact
Every fact on this page traces to a source. 18 fields cited — 18 source-backed.
NC State Extension Gardener Plant Toolbox
University extension service
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
Community photos
The photos above are our reviewed reference set, curated for accuracy.