Species

20 other cultivars

groundcoverN. America Native

Emerald Blue Moss Phlox

Q: What zones can Emerald Blue Moss Phlox grow in?

Emerald Blue Moss Phlox is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Q: Is Emerald Blue Moss Phlox deer resistant?

Yes — Emerald Blue Moss Phlox is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

Q: When does Emerald Blue Moss Phlox bloom?

Emerald Blue Moss Phlox typically blooms in early spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Q: Does Emerald Blue Moss Phlox need full sun?

Emerald Blue Moss Phlox does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Q: Is Emerald Blue Moss Phlox drought tolerant?

Yes — once established (usually after the first full season), Emerald Blue Moss Phlox handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.

Phlox subulata 'Emerald Blue'

$10.65

The Story

Plant Bio

Phlox subulata, commonly called moss phlox or creeping phlox, is a low-growing, mat-forming perennial native to the eastern United States.

This popular cultivar is noted for its profuse bloom of lavender-blue, star-shaped flowers that cover the mat of needle-like, emerald green foliage in spring.

Uses & Benefits:

Phlox subulata Emerald Blue offers vibrant blue flowers that create a stunning groundcover, adding color and texture to rock gardens and borders.

Its low-growing habit makes it an excellent erosion control plant on slopes and banks.

Provides nectar for pollinators like bees and butterflies, supporting local biodiversity.

SpeciesPhlox subulataCreeping Phlox Moss Phlox

Essentials

At a Glance

Plant Type

Groundcover

Height

6 inches

Width

24 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate, drought-tolerant once established

Humidity

Prefers dry to moderate humidity

Lifespan

Perennial

Native To

North America

Toxicity

Non-toxic to humans and pets

Bloom period

Early spring – Late spring

In flower about 3 months of the year

Marketplace

Where to Buy

American Meadows

<1 Gal PotBarerootTrays

In Stock$10.65

Great Garden Plants

<1 Gal Pot1+ Gal PotTrays

In Stock$15.99

Spring Hill Nursery

Bareroot

In Stock$19.99

Nature Hills

In Stock$28.47

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Tuck seeds or cuttings into well-draining soil in early spring.
Water thoroughly after planting to settle soil around roots.
Provide full sun for optimal flowering and growth.
Mulch around plants to retain moisture and suppress weeds.
Fertilize with a balanced, slow-release fertilizer in spring.
Prune lightly after flowering to promote bushy growth.

Pro Tip

Ensure well-draining soil to prevent root rot and promote healthy growth.

Keep It Thriving

Care Guide

Do

Water regularly during dry spells 🌱
Prune after flowering to shape the plant
Apply mulch to conserve moisture

Don't

Avoid overwatering to prevent root rot ❌
Don't fertilize late in the season
Avoid heavy shade which reduces flowering

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Pest Check
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Colorful groundcover with vibrant blue bloomsRock garden accent with low-growing foliageBorder edging with fragrant flowers

Companion Plants

SedumLavender Coreopsis Gaillardia Nepeta

Multiply

Propagation Methods

Good to Know

Common Questions