Phlox divaricata 'Blue Moon' is a compact selection of woodland phlox with richly colored violet blue flowers held in full rounded clusters. It is prized for its vibrant hue, dense growth habit, and improved flower coverage compared to the species. This cultivar retains the classic fragrance of the genus and thrives in shaded gardens where spring ephemerals are welcome early risers.
Height & Spread: 12 - 15 in x 12 - 18 in
Bloom Time: Mid to late spring
Light Requirements: Part shade to full shade
Soil Preference: Moist, rich, humus filled soil
Watering Needs: Moderate; prefers even moisture while actively growing
Deer Resistance: Moderately resistant once established
Native Status
This cultivar is derived from the native Phlox divaricata, selected for enhanced flower color and density in shaded native gardens.
WILDLIFE & INSECTS
Butterflies
- Highly attractive to early butterflies including Spring Azures and Eastern Commas.
Bees
- Supports solitary bees and bumblebees looking for spring nectar sources in wooded settings.
Moths
- Flowers are occasionally visited by clearwing moths and other day flying species in need of tubular nectar sources.
Spacing & Landscape Use
Spacing Recommendations:
- Space 12 - 18 in apart to form a cohesive spring flowering carpet beneath trees or among ferns.
Landscape Placement:
- Excellent for woodland borders, shaded foundation beds, or as a showy early season ground cover mixed with other native ephemerals.
Companion Plants
- Uvularia grandiflora (Large Flowered Bellwort) - Offers complementary nodding blooms and bright green foliage in partial shade.
- Carex pensylvanica (Pennsylvania Sedge) - Fills space and supports a soft green backdrop to Blue Moon's vivid flowers.
- Polygonatum biflorum (Solomon’s Seal) - Provides season long foliage interest and layered structure above the phlox mat.
- Stylophorum diphyllum (Wood Poppy) - Brings contrasting golden blooms and thrives in the same rich woodland soil.
- Tiarella cordifolia (Foamflower) - Combines similar stature and bloom timing, creating a dense spring tapestry.