The illustrated growing guide

Creeping Phlox (Moss Phlox)

Phlox subulata

Family Polemoniaceae

Est. zones 3-9

Botanical illustration of Creeping Phlox (Moss Phlox)
Perennial · Phlox subulata

The carpet of color that flows over spring retaining walls and slopes in a solid sheet of pink, blue, or white — a native, drought-proof, semi-evergreen mat that needs only sun and sharp drainage. Shear it lightly after bloom to keep it dense. Not to be confused with tall summer garden phlox; this one hugs the ground in early spring.

Perennial · NativeFull SunLow waterModerate growthNative to North AmericaAttracts butterfliesAttracts bees

Where to buy the plant — 3 nurseries

Prairie Phlox — a print from the Native Missouri Plants collection

From the print shop

The closest print we make

We don’t print Phlox subulata. The closest we have is Phlox pilosa (“Prairie Phlox”) in the Native Missouri Plants collection — the same genus, Phlox, not the same species.

16 designsfrom $21.99white or black groundmatte poster, unframed

Shop Native Missouri Plants botanical prints →

I

Overview

Will creeping phlox (moss phlox) suit your garden, and what goes wrong.

Will it thrive where you are?

Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what creeping phlox (moss phlox) actually needs.

Hardy inZones 3-9

Creeping Phlox (Moss Phlox) at a glance

HardinessUSDA 3–9
Mature size4-6 in mat
PollinationEarly butterflies and bees
Chill requirementNot yet established
Bloom seasonEARLY spring — a solid sheet of color spilling over walls and slopes
Harvest seasonNot yet established
Growth rateModerate

Common creeping phlox (moss phlox) problems

II

Growing

Light, water, soil, propagation and the season’s jobs.

How to grow creeping phlox (moss phlox): light, water & soil

LightFull Sun
WaterLow — drought-tough
SoilSharp drainage, sandy/rocky, lean · pH 6.0 - 7.0
FertilizerNone
PruningAfter bloom — Shear lightly right after bloom to keep it dense and tidy; it's semi-evergreen.
Spacing15-18 in

How to plant & propagate creeping phlox (moss phlox)

PropagateDivision or seed

When to spray creeping phlox (moss phlox)

Growing season. Drainage.

III

The year

What creeping phlox (moss phlox) asks for, month by month.

The creeping phlox (moss phlox) year, month by month

MonthJanFebMarAprMayJunJulAugSepOctNovDec
Bloom

What each band means

  • Bloomflowers open — pollinators working, frost on blossoms is the danger.

The creeping phlox (moss phlox) year as text

  • Jan quiet month
  • Feb quiet month
  • Mar bloom
  • Apr bloom
  • May quiet month
  • Jun quiet month
  • Jul quiet month
  • Aug quiet month
  • Sep quiet month
  • Oct quiet month
  • Nov quiet month
  • Dec quiet month

These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.

IV

Ecology & uses

What it does for the garden, and what it is grown for.

Creeping Phlox (Moss Phlox) in the garden system

  • Groundcover layer perennial
  • Nectary/insectary
  • Living mulch
AttractsButterflies, Bees
HabitatDry/rocky
MoistureUpland / dry
DeerBrowsed — protect young plants
OriginNative to North America

What creeping phlox (moss phlox) is grown for

✓ Not known to be toxic

UseSlopes
UseRetaining walls
UseRock gardens
UseSpring color

Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.

V

Cultivars

Named varieties of creeping phlox (moss phlox), ruled as a catalogue.

Best creeping phlox (moss phlox) varieties & cultivars

'Emerald Blue', 'Candy Stripe', 'Scarlet Flame', 'Snowflake' — pinks, blues, whites

VI

Sources & plant ID

Where the care distinctions come from, and how the plant is filed.

Research basis

Sources behind this profile

No extension citations are attached to creeping phlox (moss phlox)yet. The care figures below come from the library's own catalogue rather than a traced primary source.

Plant ID

BinomialPhlox subulata
FamilyPolemoniaceae
TypePerennial
USDA symbolPHSU3
OriginNative to North America
Invasive riskLow

VII

Where to buy

Third-party nurseries — not Story Thyme Farms.

Third-party nurseries, not Story Thyme Farms. Prices are theirs.

Story Thyme Farms may earn a small commission from these links, at no cost to you — it never changes what we recommend.

VIII

Questions

Creeping Phlox (Moss Phlox) questions, answered straight.

Is creeping phlox (moss phlox) safe for kids and pets?

Creeping Phlox (Moss Phlox) is commonly eaten and isn't considered toxic, but "commonly eaten" isn't a guarantee for any particular person or animal — allergies, quantity, and which part you eat all matter. Never eat a plant you haven't positively identified, and check with a vet before letting pets or livestock graze anything new.

How do you propagate creeping phlox (moss phlox)?

Division or seed.

IX

Elsewhere

Where creeping phlox (moss phlox) sits in the library.

Where creeping phlox (moss phlox) sits in the library

Grows in the same world