Phlox, Creeping Phlox, Moss Phlox 'Emerald Blue'

Phloxsubulata

Family
Polemoniaceae (po-le-moh-nee-AY-see-ee)
Genus
Phlox (floks)
Species
subulata (sub-yoo-LAH-tuh)
Synonym
Sun Exposure
Full Sun
Foliage
Evergreen
Height
under 6 in. (15 cm)
Spacing
18-24 in. (45-60 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Bloom Color
Blue-Violet
Bloom Time
Mid Spring
Other Details
Category
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Propagation Methods
From herbaceous stem cuttings
By simple layering
By stooling or mound layering
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

San Leandro, California

Ellendale, Delaware

Iowa City, Iowa

Red Oak, Iowa

Franklin, Massachusetts

Uxbridge, Massachusetts

Lansing, Michigan

Royal Oak, Michigan

Hopkins, Minnesota

Minneapolis, Minnesota

Mathiston, Mississippi

Saint Louis, Missouri

Omaha, Nebraska

Sandown, New Hampshire

Rio Rancho, New Mexico

Binghamton, New York

Lake Grove, New York

Concord, North Carolina

Elizabeth City, North Carolina

Pittsboro, North Carolina

Raleigh, North Carolina

Belfield, North Dakota

Haviland, Ohio

Enid, Oklahoma

Hulbert, Oklahoma

Harrisburg, Pennsylvania

Mc Keesport, Pennsylvania

Osceola Mills, Pennsylvania

Easley, South Carolina

Inman, South Carolina

Greeneville, Tennessee

Knoxville, Tennessee

Carrollton, Texas

Fort Worth, Texas

Nevada, Texas

Salt Lake City, Utah

South Jordan, Utah

Richmond, Virginia

MOXEE, Washington

Shelton, Washington

Skokomish, Washington

Milwaukee, Wisconsin

show all

Featured Videos

Gardener's Notes:

5
positives
2
neutrals
0
negative
Sort By:
Sort By:
J
Pittsboro, NC | October 2016 | neutral

I bought "Emerald Blue" as well as variety "Candy stripe" in late July. Both were planted in similar planters right next to one another. ...Read More

M
Hopkins, MN (Zone 4a) | April 2012 | positive

I needed some companions to crackerjack phlox, and I selected Emerald Blue. It's lovely; I find it a bit taller (or as I call it "puffie...Read More

M
Franklin, MA | July 2010 | neutral

I bought two of these and one Fort Hill this past early spring. By far, Fort Hill looked the best and so far is surviving the best out of...Read More

C
Carrollton, TX | May 2010 | positive

It's silly but I love this little plant. The beautiful mossy dark green ground cover grows quickly to cover areas and when it blooms in s...Read More

E
Minneapolis, MN | April 2010 | positive

My plant was from a friend, so I don't know what variety it is. The color is lavender, and looks more or less like this variety, though.

O
Enid, OK (Zone 7a) | April 2008 | positive

This is a beautiful little plant which grows rather slowly. It flowers for an extended time in the spring in our region. I plan to prop...Read More

G
(Zone 5a) | January 2006 | positive

Blooms late April to late May in my garden.

I love 'Blue Emerald', but wish it grew a bit faster. My information says it ...Read More

Featured
Omnivorous Tussock-moth
(Acyphas semiochrea)
Trumpeter Swan
(Cygnus buccinator)
Featured
Omnivorous Tussock-moth
(Acyphas semiochrea)
Trumpeter Swan
(Cygnus buccinator)