Emerald Blue Moss Phlox is a low-growing, mat-forming perennial prized for its dense carpet of lavender-blue flowers in spring. Fine, needle-like evergreen foliage forms a tight groundcover that spreads outward, making it ideal for rock gardens, slopes, edging, and cascading over retaining walls. In mid-spring the plant becomes almost completely covered in star-shaped blooms, creating a vibrant blanket of color that attracts butterflies and early pollinators. It is very hardy and tolerant of drought once established, making it an excellent perennial for prairie gardens and low-maintenance landscapes.
- Size: Height: 8–15 cm (3–6 in). Spread: 45–60 cm (18–24 in)
- Bloom time: Mid to late spring
- Growth habit: Low, spreading evergreen groundcover
- Light: Full sun (best flowering) to light partial shade
- Soil: Well-drained soil; thrives in sandy or rocky soils
- Water: Low to moderate; drought tolerant once established
- Hardiness: Zones 3–9 (very winter hardy)
- Maintenance: Shear lightly after flowering to keep a tidy mat and encourage new growth
- Spacing: 45–60 cm apart for groundcover coverage