- Partial Shade to Full Sun (At Least 3 Hours Of Direct Sunlight)
- Mature Height 3 - 6 Inches
- Mature Spread 3 - 6 Inches
- Growing Zones 3 - 8
Emerald Blue Moss Phlox (creeping phlox) blooms abundantly and forms a solid groundcover, even in tricky sites. In the spring, it is smothered in fragrant, star-shaped, blue-violet blossoms. The blooms continue until early summer and attract butterflies. The evergreen foliage is needle-like and resembles moss, accounting for the common name. This phlox forms a spreading mat that suppresses weeds and requires little maintenance.
Emerald Blue grows as a low, dense mound, only 3 – 6 inches high. It spreads quickly to 2 – 3 feet wide, working well as a flowering groundcover. Its parent species Phlox subulata is native to the eastern United States and is commonly found in sandy pine or oak barrens. Emerald Blue is not appealing to deer but could be nibbled by rabbits. It tolerates heat and humidity, and poor, dry soils. Use it as an easy groundcover in a rock garden, or let it cascade over a retaining wall or slope. It also makes a cheerful ‘spiller’ in outdoor container plantings.
Emerald Blue Moss Phlox Care
This phlox performs best in full sun with at least 6 hours of direct sunlight a day, although it may need some afternoon shade in hot summer climates. It prefers moist, well-drained soil, but also can be grown in dry, rocky, and sandy soils. Water new plants regularly during the summer months to establish a strong root system. Established plants will not need much supplemental water in the summer. Apply a layer of high-quality compost to keep the root system from drying out.
After blooming, shear the plant back by half to maintain a compact, tidy appearance. Clean up any tattered foliage in the spring. Phlox can be divided every 3-5 years in spring or fall.
Emerald Blue Moss Phlox Spacing
To plant a solid groundcover, space each plant approximately 2 feet apart on center, in staggered rows. For container plantings, select a frost-proof pot at least 18 inches in diameter with large drainage holes.
Emerald Blue Moss Phlox Information
USDA Hardiness Zones: 3 - 8 |
Plant Type: |
Light Exposure: Partial Shade to Full Sun (At Least 3 Hours Of Direct Sunlight) |
Mature Height: 3 - 6 Inches |
Mature Spread: 2 - 3 Feet |
Spacing: 2 - 3 Feet |
Habit: Spreading, Trailing |
Flower Color(s): Blue |
Flower Description: |
Bloom Period: |
Foliage Type: Herbaceous |
Foliage Color(s): Green |
Foliage Description: |
Seasonal Interest: Spring Flowering |
Watering: Average |
Resists: Deer |
Tolerates: Drought, Salt |
Attracts: Bees, Butterflies |
Container Role: |
Uses: Borders, Containers, Edging, Groundcovers, Mass Planting, Wildlife Gardens |
Features: Attracts Pollinators, Low Maintenance |
Brand: |
Common Name: Emerald Blue Moss Phlox |
Other Name(s): |
Scientific Name: PHLOX SUBULATA `EMERALD BLUE` |
- SKU:
- 1231000960-pc
Container Sizes
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.

Quart Pot
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts

2.5 Quart
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts

#1 Pot
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts

#2 Pot
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons

#3 Pot
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons

#5 Pot
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons

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Pre-Ordered Plants
Pre-ordered plants are scheduled to ship in Spring 2025. We carefully plan our shipping dates based on your USDA Plant Hardiness Zone to ensure optimal planting conditions upon arrival. Want it sooner/later? Reach out, and we'll try our best to accommodate.
Estimated Spring Shipping Schedule
Estimated ship week for pre-ordered plants will ship based on growing zones as shown below.
Growing Zone | Estimated Ship Week |
---|---|
Zone 10 | March 24th |
Zone 9 | March 31st |
Zone 8 | April 7th |
Zone 7 | April 14th |
Zone 6b | April 21st |
Zone 6a | April 28th |
Zone 5b | May 5th |
Zone 5a | May 12th |
Zone 4 | May 19th |
Zone 3 | May 26th |
Note: These are only estimated ship dates. Plants may ship out later depending on weather & growing conditions of the plant.
Note: Only plants indicated as pre-order will ship as shown above. All other plants and hard goods will ship as normal.
Plants Shipping Now
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.