High Country Gardens
SNOWMASS Phlox
Best low-maintenance groundcover for native rock gardens and erosion control.
Discover the SNOWMASS® Phlox, a stunning groundcover that forms dense, evergreen mats. This perennial plant, also known as Cleft Phlox or Sand Phlox, bursts forth in spring with a profusion of unique, star-like white flowers. Native to the central US, it thrives in well-drained soil and tolerates both full sun and dry shade. Ideal for erosion control in rocky or sandy areas, it also supports local wildlife by providing nectar for butterflies and moths. Its resilience against powdery mildew and root rot makes it a low-maintenance choice for rock gardens, borders, and native plant displays.
$15.99
Owner Satisfaction
4.7
/ 5
Category Rank
29
/ 3076
#29 in Landscaping & Garden Plants
Price vs Category Average
-42%
Below average
Growth Habit
Groundcover
/ Groundcover
Who it's for
- Gardeners seeking low-maintenance weed control for slopes
- Xeriscaping enthusiasts in cold climates needing reliable perennials
- Landscapers wanting year-round visual interest in garden beds
Who should skip it
- Gardeners in humid climates lacking optimal airflow
- Gardeners prioritizing long-season floral color displays
- Homeowners with heavy clay soil or shaded garden areas
Performance breakdown
Maintenance Ease
Resilience against common diseases makes this a true set-and-forget perennial.
Erosion Control
Dense evergreen mats provide excellent soil stabilization for rocky or sandy slopes.
Pollinator Impact
Provides essential nectar sources for local butterflies and native moth populations.
Environmental Adaptability
Thrives across diverse light conditions from full sun to dry shade.
Visual Appeal
Star-like white blooms create a striking, high-contrast display every spring.
Regional Hardiness
Reliable performance across zones five through nine ensures broad geographic utility.
Key Specs
Growth Habit
Groundcover
Mature Height
4-8 inches
Mature Spread
14-18 inches
Pot Size
5" Deep Pot
Hardiness Zones
5-9
Light Requirements
Full Sun to Part Shade
Soil Type Compatibility
Sandy Soil, Clay Soil, Well-Drained Soil
Plant Life Cycle
Perennial
Features
- Forms a dense evergreen mat.
- Unique star-like white flowers in spring.
- Native plant from the Central US.
- Supports native insects and pollinators.
- Resistant to common diseases.
- Versatile for various garden styles.
- Awarded Plant Select® selection.
What customers say
Customers consistently praise the exceptional quality and reliability of the SNOWMASS Phlox. Reviewers frequently note the plants arrive healthy and establish quickly, even in difficult soil or full sun. The dense, brilliant white blooms provide outstanding ground cover and return reliably year after year, exceeding expectations for hardiness and vigor. This makes it a highly valued addition for gardeners seeking low maintenance, high impact perennial color.
Know before you buy
Yes, its dense, mat-forming growth habit makes it an excellent choice for stabilizing soil in rocky or sandy areas, helping to prevent erosion on slopes.
It is a low-maintenance perennial. Because it is naturally resistant to common issues like powdery mildew and root rot, it requires very little intervention once established.
While it prefers well-drained soil, it is adaptable to various soil types, including clay. Just ensure the planting site does not stay waterlogged, as good drainage is essential for its long-term health.
Yes, SNOWMASS Phlox forms a dense, evergreen mat, meaning it will provide ground cover and color in your garden even during the winter months.
The star-like white flowers provide a valuable nectar source for local butterflies and moths, making it a great addition to a pollinator-friendly garden.
Since the mature spread of this plant is 14 to 18 inches, you should space them about 15 to 18 inches apart to allow the mats to grow together for full coverage.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$16