Photo by Melody

PlantFiles: Louisiana Blue Phlox, Woodland Phlox, Wild Sweet William, Wild Blue Phlox
Phlox divaricata 'Blue Moon'

Family: Polemoniaceae (po-le-moh-nee-AY-see-ee) (Info)
Genus: Phlox (floks) (Info)
Species: divaricata (dy-vair-ih-KAY-tuh) (Info)
Cultivar: Blue Moon

4 vendors have this plant for sale.

4 members have or want this plant for trade.

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12-18 in. (30-45 cm)

12-15 in. (30-38 cm)

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)

Sun Exposure:
Sun to Partial Shade
Light Shade

Unknown - Tell us

Bloom Color:
Medium Blue
Dark Blue

Bloom Time:
Mid Spring
Late Spring/Early Summer


Other details:
Average Water Needs; Water regularly; do not overwater
Flowers are fragrant

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From herbaceous stem cuttings
By simple layering
By serpentine layering

Seed Collecting:
Bag seedheads to capture ripening seed
Seed does not store well; sow as soon as possible

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There are a total of 10 photos.
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3 positives
No neutrals
No negatives

Gardeners' Notes:

Positive OldPerfessor On May 4, 2012, OldPerfessor from Hazard, KY (Zone 6b) wrote:

This is a great little plant to add to the flower garden. I have apprx. 6 of these that surround my flag pole and they have really exploded this Spring. They bloom here early and stay in bloom till the 1st of May. Also, they grow quite tall and should NOT be confused with Creeping Phlox. Average height is around 8" tall. They have a wonderful fragrance and a light blue bloom that is hard to beat.

Positive whitesam9 On Feb 25, 2012, whitesam9 from Dayton, OH (Zone 5b) wrote:

I love this plant. The pictures don't always do it justice. The pictures sometimes make the flowers look lavender or pink, but they are really a beautiful shade of blue. It's one of the prettiest blues in my garden and has a fairly long blooming season for most of April and May.

Positive secygbo On Oct 25, 2009, secygbo from Watertown, MA wrote:

This is one of my favorite plants. It has beautiful blue flowers in April and May which always get a lot of compliments. It is not a tall plant, growing about 6-8". It doesn't suffer from phlox mildew, so don't hesitate to get some. It even does well in shade or part shade.


This plant has been said to grow in the following regions:

Cherry Valley, Illinois
Chicago, Illinois
Plainfield, Indiana
Hazard, Kentucky
Hopkins, Minnesota
Florence, Mississippi
Enid, Oklahoma
Christiana, Tennessee
Knoxville, Tennessee
Leesburg, Virginia
Pavillion, Wyoming
Riverton, Wyoming

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