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Phlox divaricata 'Blue Moon' (woodland phlox)

Phlox divaricata 'Blue Moon'

woodland phlox

Showy, fragrant, deep violet-blue flowers
Blooms April through May
Will naturalize
Attracts hummingbirds & butterflies
Prefers rich, moist, organic soils

Selected for outstanding flower color and very full flower petals, 'Blue Moon' bears many fragrant, 5-petaled flowers with the arrival of spring. Enjoy a knee-high sea of elegant, violet-blue flowers that attract hummingbirds & butterflies to your garden. Foliage is lance shaped and medium green. A long-lived, carefree native groundcover.

Phlox divaricata 'Blue Moon' LP32 - 32 per flat Availability
Phlox divaricata 'Blue Moon' - 72 per flat Availability
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12-18 Inches


8-12 Inches


10 Inches

Bloom Color


USDA Hardiness Zone 3-8

woodland phlox Interesting Notes

Need a bold shot of color to herald spring's arrival? Creeping Phlox are an invaluable addition to any rock garden, foundation, or as an edger. This impressive little native is just perfect for your woodland garden. Phlox Blue Moon has outstanding larger over-lapping flowerheads of beautiful rich blue violet. A New England Wildflower Society introduction. Hellebores and Ferns make a perfect combination to this Phlox. - Bluestone Perennials

Phlox divaricata: An indispensible spring ephemeral for eastern shade gardeners. The plants loft clouds of 1-foot flowering stems with narrow, pointed cauline leaves that die after blooming and in the summer spread low stems of more rounded, dark green foliage. They will usually begin to self-sow and create great drifts that blend well with other woodlanders in successional plantings. It blooms a week or two earlier than P. stolonifera, so plant both for longer bloom. - William Cullina, The New England Wild Flower Society Guide to Growing and Propagating Wildflowers

If P. stolonifera hugs, P. divaricata hovers. The blue woodland phlox is nearly twice as high (to the knee when in flower) and twice as sweet; its other name is wild sweet William. Plants will cover ground more slowly than P. stolonifera, but we're still talking a creeping mound. Though each of its petals is notched at the tip for a somewhat showier flower, what really undoes me about the long-blooming P. divaricata is what it makes of the color blue: icy, subtle, rich, or startling, depending on the selection. Out of flower, it doesn't have quite the foliage presence of P. stolonifera (it's not as dense a cover); its strength is not as a specimen but as a mingler, chatting its way across the woodland floor. - Ketzel Levine's Talking Plants

The genus name Phlox is derived from the Greek word for flame.

Phlox divaricata 'Blue Moon' Growing and Maintenance Tips

P. divaricata prefers bright shade with organic, rich, moist, well-drained soils. These slowly spreading stemmed flowers can be found in rich woods and along stream banks. Give good air circulation to reduce growth of powdery mildew. Benefits from occasional fertilization. May be propagated by terminal shoot or root cuttings. Cut back after first bloom to promote second round of growth. Makes an excellent addition to the perennial, naturalized area or rock garden.

Good Substitutions

creeping phlox Phlox stolonifera 'Sherwood Purple'
creeping phlox Phlox stolonifera 'Home Fires'
wild blue phlox Phlox divaricata 'May Breeze'

Key Characteristics & Attributes

Full Shade
Full Shade
Part Sun
Part Sun
Early Spring
Early Spring

Additional Information

Soil Moisture Needs
Plug Type
Horticultural Plug
Landscape Plug™
Season of Interest (Flowering)
Late Spring / Early Summer
Green Infrastructure
Native to North America
Propagation Type