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Phlox subulata

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Kemper Code:  C268

Common Name: moss phlox
Zone: 3 to 9
Plant Type: Herbaceous perennial
Family: Polemoniaceae
Missouri Native: No
Native Range: Eastern and central United States
Height: 0.25 to 0.5 feet
Spread: 1 to 2 feet
Bloom Time: March - May  
Bloom Color: Red-purple to violet-purple to pink to white
Sun: Full sun
Water: Medium
Maintenance: Medium


Plant Culture and Characteristics

Sources for this plant

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  Uses:       Wildlife:   Flowers:   Leaves:   Fruit:
Hedge Suitable as annual Attracts birds Has showy flowers Leaves colorful Has showy fruit
Shade tree Culinary herb Attracts Has fragrant flowers Leaves fragrant Fruit edible
Street tree Vegetable   hummingbirds Flowers not showy Good fall color   Other:
Flowering tree Water garden plant Attracts Good cut flower Evergreen Winter interest
Gr. cover (<1') Will naturalize   butterflies Good dried flower     Thorns or spines

General Culture:

Best grown in humusy, medium moisture, well-drained soils in full sun. Best flowering is in full sun, but plants generally appreciate some dappled sun in the hot summers of the deep South. Good soil drainage is important. Plants grow well in sandy or gravely soils and tolerate hot, dry exposures better than most other species of phlox. Plants will self-seed in optimum growing conditions. Cut back stems after flowering by 1/2 to maintain form and promote denser growth plus to stimulate a possible light rebloom.

Noteworthy Characteristics:

Moss phlox (also moss pink, mountain phlox or creeping phlox) is a vigorous, spreading, mat-forming, sun-loving phlox that grows to only 6” tall but spreads to 24” wide. It is noted for it creeping habit, its linear to awl-shaped leaves (which retain some green in winter) and its profuse carpet of mid-spring flowers with notched flower petals. It is native to somewhat dry, rocky or sandy places, open woodland areas and slopes from Michigan, Ontario and New York south to Tennessee and mainly in the Appalachians to North Carolina. Loose clusters (cymes) of fragrant, tubular flowers (to 3/4” wide) bloom in April-May. Flowers are red-purple to violet-purple, pink or infrequently white. Each flower has five, flat, petal-like, rounded lobes that are distinctively notched. Linear to awl-shaped, green leaves (to 1” long). From Latin, subulata means awl-shaped in reference to the leaves. Vegetation mats purportedly resemble moss, hence the common name of moss phlox. Many cultivars of this plant are available in commerce featuring flower colors of blue/purple, pink, red and white.

Problems: Click for detailed list of pests and problems.

Phlox subulata and its cultivars do not seem to be bothered by powdery mildew to the same extent as are most other species of phlox. Spider mites can be a problem, particularly in hot, dry conditions. Foliar nematodes can cause damage in wet/humid conditions. Watch out for rabbits.

Uses:

Rock gardens, edgings, foundations or ground covers. Ground covers are particularly valued in sunny areas of woodland gardens, slopes, native plant gardens or naturalized areas. Also appropriate for sunny areas of border fronts. Drape slightly over a rock wall.

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