Phlox subulata (Creeping or Moss Phlox)

What Should I Grow Creeping Phlox?

There are several compelling reasons to grow this wonderful little plant in your garden:

• Spectacular Blooms: Creeping Phlox produces a vibrant, carpet-like display of star-shaped flowers in the spring that’s a real show-stopper.
• Groundcover: Its creeping habit makes it an excellent choice for a groundcover. It fills in areas quickly, helping to crowd out weeds and prevent soil erosion.
• Easy to Maintain: Once established, Phlox subulata requires little care. It’s drought-tolerant and isn’t picky about soil, though it prefers well-drained conditions.
• Attracts Pollinators: If you’re looking to attract butterflies, hummingbirds, and other pollinators to your garden, Creeping Phlox is an excellent choice.
• Versatility: Creeping Phlox is excellent for a variety of landscaping uses, including rock gardens, border fronts, edging, and as a lovely carpeting over bulb beds.
• Deer and Rabbit Resistance: While no plant is entirely deer or rabbit-proof, Creeping Phlox tends to be resistant to these common garden pests.
• Seasonal Interest: In addition to its spring bloom, its evergreen needle-like foliage provides visual interest in the garden year-round.

Garden Design with Creeping Phlox

Creeping Phlox, or Phlox subulata, can play a key role in garden design due to its colorful, carpet-like blooms, evergreen foliage, and sprawling habit. Here are some ideas on how to incorporate it into your garden:

• Rock Gardens: Creeping Phlox thrives in well-drained soil and is an excellent choice for rock gardens, where it can sprawl over rocks and highlight their structures.
• Borders and Edges: Use Phlox subulata to outline paths or border flower beds. The vibrant colors provide a stunning contrast against the greens and other colors in your garden.
• Slopes and Banks: Creeping Phlox is an effective ground cover for slopes and banks where it can help prevent soil erosion while providing a colorful display. It also requires less maintenance in these hard-to-reach areas.
• Containers: Although usually seen in gardens, Creeping Phlox can also be used in containers or hanging baskets where it will spill over the edges for a beautiful effect.
• Wildlife Gardens: As it’s a magnet for pollinators, use Creeping Phlox in a wildlife or pollinator-friendly garden.
• Carpet Bedding: Use different colors of Creeping Phlox to create vibrant carpet-like designs. This technique is referred to as carpet bedding and can make a big impact in large-scale landscapes.

Creeping Phlox Companion Plants

Creeping Phlox (Phlox subulata) pairs beautifully with many other plants in the garden. Here are some suggestions for companion plants:

• Spring Bulbs: Creeping Phlox makes a gorgeous underplanting for spring bulbs like tulips and daffodils. As the bulbs finish blooming, the Phlox will take over, hiding the dying bulb foliage and extending the color show into late spring.
• Sedums: Sedums and other succulents make great companions for Creeping Phlox in rock gardens or other well-drained spots. Their fleshy foliage contrasts nicely with the needle-like leaves of the Phlox.
• Evergreen Shrubs: Small evergreen shrubs, like boxwood or holly, provide year-round structure and contrast to the seasonal display of Creeping Phlox.
• Ornamental Grasses: The soft, billowy texture of ornamental grasses contrasts beautifully with the dense, mat-forming habit of Creeping Phlox.
• Other Groundcovers: Pair Creeping Phlox with other groundcovers like Ajuga or Vinca for a multi-season carpet of color and interest. Be careful to balance their growth habits to prevent one from overwhelming the other.
• Perennial Flowers: Late-emerging perennials, such as daylilies or tall phlox, can be effectively paired with Creeping Phlox. The Phlox will keep the ground covered and interesting until the perennials emerge later in the season.
• Rock Garden Plants: Creeping Phlox thrives in the same conditions as many rock garden plants. Consider pairing it with hens-and-chicks (Sempervivum), creeping thyme, or dwarf conifers for a diverse, textured planting.

Growing Tips

Growing Creeping Phlox (Phlox subulata) can be a rewarding experience due to its vibrant spring display and low-maintenance requirements. Here are some tips for successfully growing this plant:

• Location: Creeping Phlox thrives in full sun, but it can tolerate light shade, especially in hotter climates. More sun typically leads to a denser bloom.
• Soil: This plant prefers well-drained soil. While it can tolerate a range of soil types, from sandy to clay, it doesn’t like to sit in water. Consider amending your soil with compost or other organic matter to improve drainage, especially if your soil is heavy clay.
• Watering: Creeping Phlox is drought-tolerant once established and doesn’t need a lot of water. However, during the first year, make sure to provide regular water to help the plants establish a strong root system.
• Feeding: In early spring, feed Creeping Phlox with a slow-release, balanced fertilizer to support healthy growth and abundant flowering.
• Pruning: After the blooming period, you can trim the plant back to maintain its shape and encourage denser growth. This can also help to prevent the center of the plant from becoming woody.
• Mulching: While not necessary, a light layer of mulch can help to retain soil moisture and suppress weeds.
• Propagation: Creeping Phlox is easily propagated through division. Every few years, you can divide the plant in spring or early fall and replant the divisions to spread the beauty of Creeping Phlox throughout your garden.
• Pests/Diseases: While generally low-maintenance, keep an eye out for common issues like spider mites and powdery mildew. Ensure good air circulation and avoid overhead watering to prevent fungal diseases.

Frequently Asked Questions

When to Plant Creeping Phlox?

The best time to plant Creeping Phlox (Phlox subulata) is in the early spring or early fall. In spring, the plants can establish themselves before the heat of summer. Fall planting allows the plants to establish their root systems before winter so that they’re ready to grow and bloom vigorously the following spring.

How Does Creeping Phlox Look Like When Not in Bloom?

When not in bloom, Creeping Phlox forms a dense mat of green foliage. The leaves are needle-like, similar to those of some evergreens, and remain green throughout the year in most climates. The growth habit is low and spreading, making it an attractive groundcover even when not in flower.

How Long Does Creeping Phlox Bloom?

Creeping Phlox typically blooms for a period of three to four weeks in late spring and early summer, though the exact timing can vary depending on your climate and the specific variety of Phlox. The flowers cover the plant so thoroughly that you can barely see the leaves during the peak of blooming. Some varieties may have a second, though less vigorous, bloom in the early fall.