Phlox glaberrima subsp. interior

Common name: Marsh Phlox

Native plant

Marsh phlox, also known as Smooth Phlox, is a clump-forming perennial that typically grows 2-4' tall. It naturally occurs in wet woods, wet thickets, wet meadows and low prairies. Aromatic, pink to reddish-purple, tubular flowers appear in large, clusters atop stiff, upright stems. This plant seldom needs staking and is one of the few tall phloxes to bloom in spring. This species is very similar in appearance to Phlox paniculata (Garden Phlox) except it blooms earlier and leaves are hairless and narrow.  Smooth phlox is a good cut flower.


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Price Level: 
Perennial- Specialty Species Tier 2
Sizing Options: 
Flat of 32 (plugs)
Flat of 18 (pints)
1 Gallon


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Plant Details

Plant type


Soil type

Mesic (Not too Wet Not too Dry), Moist Mesic, Wet

Light exposure

Full Sun, Partial Sun / Part Shade

Bloom period


Urban environment

Yards that Flood


Floodplain, Moist Woods, Prairie Grasslands

Growth form

Shrubby/Clump, Colonizing / Spreading

Growth rate


Flower color


Fall color



Mature height
2 Feet
Mature width
10 Inches
Max height
3 Feet
Max width
2 Feet

Additional information

Butterfly host plant Pollinator hot spot Rain garden suited

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Price:  $7.50