How To Plant Creeping Phlox [ Full Guide ]

Creeping phlox, also known as moss phlox or mountain phlox, is a low-growing, mat-forming perennial plant that produces a stunning carpet of colorful flowers in the spring. It is a popular choice for ground cover, rock gardens, and along slopes or borders due to its spreading habit and vibrant blooms. Planting creeping phlox is relatively easy and can be a rewarding way to add beauty and versatility to your garden landscape. This comprehensive guide will walk you through the step-by-step process of planting creeping phlox, including climate and soil requirements, choosing the right location, preparation of the planting area, and selecting the right creeping phlox variety for your garden.

Quick Answer: How To Plant Creeping Phlox

To quickly summarize the process of planting creeping phlox:

  1. Choose a location with well-drained soil and full sun to part shade.
  2. Prepare the planting area by clearing weeds and improving soil drainage if necessary.
  3. Dig a hole slightly larger than the root ball of the creeping phlox.
  4. Gently place the plant in the hole, backfill with soil, and water thoroughly.
  5. Mulch around the plant to retain moisture and suppress weed growth.
  6. Water the plant regularly, especially during the establishment period.

Climate And Soil Requirements

Before delving into the planting process, it is crucial to understand the climate and soil requirements for successfully growing creeping phlox.

Climate Requirements

Creeping phlox thrives in moderate to cool climates and is best suited for USDA hardiness zones 3 to 9. It prefers cooler temperatures and can tolerate light frosts. However, in hotter climates, it may require some protection from intense afternoon sun to prevent leaf scorching.

Soil Requirements

The ideal soil for creeping phlox is well-drained and slightly acidic to neutral with a pH range of 6.0 to 7.0. It does not tolerate waterlogged or overly compacted soils and may suffer from root rot if planted in poorly draining areas. Amending heavy clay soils with organic matter such as compost or peat moss can improve drainage and create a more suitable growing environment for creeping phlox.

Choosing The Right Location

Selecting the right location is critical for the successful establishment and growth of creeping phlox. Consider the following factors when choosing a planting site:


Creeping phlox thrives in full sun to part shade. Aim to plant it in a location that receives at least 6 hours of direct sunlight per day. However, in regions with hot summers, providing afternoon shade can help protect the plant from heat stress and maintain vibrant foliage.

Soil Drainage

Ensure the chosen location has well-drained soil to prevent waterlogging, which can lead to root rot and other moisture-related issues. Avoid areas with heavy clay soils or standing water, as these conditions can be detrimental to the health of creeping phlox.

Air Circulation

Good air circulation is important for reducing the risk of foliar diseases. Avoid planting creeping phlox in cramped, overcrowded spaces where air movement may be restricted.

Preparation Of The Planting Area

Proper preparation of the planting area sets the stage for healthy growth and development of creeping phlox. Follow these steps to prepare the area for planting:

Clearing The Area

Begin by clearing the planting area of any existing vegetation, including weeds, grass, and debris. This will minimize competition for resources and create a clean space for the new plants to thrive.

Soil Improvement

If the soil is compacted or lacks adequate drainage, consider improving it before planting. Incorporating organic matter, such as compost or peat moss, can enhance soil structure and fertility while promoting better drainage. Work the amendments into the soil to a depth of 6 to 8 inches to ensure they are well integrated.

Soil Testing

Conduct a soil test to determine the pH and nutrient levels of the soil. This information will guide you in making any necessary adjustments to create an optimal growing environment for creeping phlox. If the soil pH is outside the recommended range, amendments can be added to bring it into the desired range.

Choosing The Right Creeping Phlox Variety

Creeping phlox comes in a variety of cultivars, each offering unique flower colors and growth habits. When selecting a creeping phlox variety for your garden, consider the following factors:

Flower Color

Creeping phlox is prized for its abundant, star-shaped flowers that appear in spring, creating a colorful spectacle. Different cultivars offer a range of flower colors, including shades of pink, purple, white, and blue. Choose a variety that complements your existing garden palette or provides a striking contrast.

Growth Habit

While all creeping phlox varieties exhibit a low, spreading growth habit, some may spread more vigorously than others. Consider the space you have available and the desired coverage area when selecting a variety. Compact cultivars may be better suited for smaller spaces or containers, while more vigorous types are ideal for larger expanses.

Foliage Characteristics

In addition to their vibrant flowers, creeping phlox plants also feature attractive foliage. Some varieties display variegated or evergreen foliage, adding visual interest even when not in bloom. Consider the foliage characteristics of each cultivar to enhance the overall appeal of your garden throughout the growing season.

Planting creeping phlox can enhance the beauty and diversity of your garden landscape, providing a stunning carpet of flowers and vibrant foliage. By understanding the climate and soil requirements, selecting an appropriate location, preparing the planting area, and choosing the right variety, you can establish healthy and thriving creeping phlox plants in your garden. With proper care and maintenance, these low-maintenance perennials will reward you with years of beauty and color, making them a valuable addition to any garden setting.

Purchasing And Preparing The Plants

Creeping phlox (Phlox subulata) is a beautiful flowering ground cover that belongs to the Polemoniaceae family. It can add vibrant colors to your garden with its delicate, five-petaled flowers that bloom in shades of pink, white, purple, and blue. Creeping phlox is a popular choice for rock gardens, slopes, and borders due to its low-growing and spreading habit, making it an excellent choice for filling in empty spaces.

RELATED  How To Plant Tomato Plant [ Full Guide ]

Before you begin planting creeping phlox, it’s essential to find healthy and well-established plants. Here’s what you need to consider when purchasing and preparing the plants:

  1. Source: Look for a reputable nursery or garden center that offers healthy and disease-free creeping phlox plants. Buying from a reliable source will ensure that you get high-quality plants with a good root system.

  2. Plant selection: Choose creeping phlox plants that have vibrant and healthy foliage. Avoid plants with wilted or yellowing leaves, as they may indicate disease or poor health.

  3. Suitable varieties: Creeping phlox comes in various color variations, so choose the ones that best complement your garden’s color scheme. Some popular varieties include “Emerald Blue”, “Candy Stripe”, “White Delight”, and “Scarlet Flame”.

  4. Preparation: Before planting, soak the plants in water for a few minutes to hydrate the roots. This step will help the plants establish more easily once transplanted into the soil.

Planting The Creeping Phlox

Once you have purchased and prepared your creeping phlox plants, it’s time to plant them in your garden. Follow these steps to ensure proper planting and optimal growth:

  1. Location selection: Choose a location that receives full sun to partial shade for planting creeping phlox. While these plants can tolerate some shade, they thrive best in sunny areas. Ensure the soil in the chosen location is well-draining, as creeping phlox prefers soil that doesn’t retain excess moisture.

  2. Soil preparation: Before planting, prepare the soil by removing any weeds, rocks, or debris. Loosen the soil to a depth of about 6-8 inches using a garden fork or tiller. Incorporate organic matter such as compost or well-rotted manure to improve the soil’s fertility and drainage.

  3. Spacing: Creeping phlox plants require ample space to spread and grow, so ensure you provide enough room for their trailing habit. Space each plant around 12 to 18 inches apart to allow for proper air circulation and prevent overcrowding.

  4. Planting process:

    • Dig a hole slightly larger than the root ball of the creeping phlox plant.

    • Gently remove the plant from its container and loosen the outer roots.

    • Place the plant in the hole, ensuring it sits at the same depth as it was in the container. The crown of the plant, where the roots meet the stems, should be level with the soil surface.

    • Backfill the hole with soil, firming it gently around the plant to remove any air pockets.

    • Water the newly planted creeping phlox thoroughly to settle the soil and help the roots establish.

  5. Support: If you are planting on a slope or incline, it’s a good idea to use stakes or rocks to support the plants until they establish a strong root system. This will prevent soil erosion and ensure the plants remain in place.

Watering And Fertilizing

Proper watering and fertilizing are crucial for the healthy growth and vibrant blooms of creeping phlox. Follow these tips to ensure adequate moisture and nutrition for your plants:

  1. Watering: Creeping phlox requires regular watering, especially during the first growing season. Water deeply once a week, providing enough moisture to penetrate the root zone. The soil should be evenly moist, but avoid overwatering, as it can lead to root rot and other issues. Once the plants are established, they become more drought-tolerant, but it’s still important to provide supplemental irrigation during prolonged dry spells.

  2. Fertilizing: Creeping phlox is a low-maintenance plant that doesn’t require excessive fertilization. However, applying a balanced, slow-release fertilizer once in early spring can help promote healthy growth and abundant blooms. Follow the manufacturer’s instructions for the appropriate dosage and method of application. Avoid over-fertilizing, as it can result in excessive foliage growth at the expense of flowers.

  3. Organic alternatives: If you prefer organic methods, you can amend the soil with well-rotted compost or aged manure instead of using synthetic fertilizers. These organic amendments will enrich the soil and provide a slow release of nutrients to the plants.

Mulching And Weed Control

Mulching and weed control are essential for maintaining the health and appearance of your creeping phlox plants. Consider the following guidelines:

  1. Mulching: Apply a layer of organic mulch, such as wood chips or shredded bark, around the base of the plants. Mulch helps to conserve soil moisture, suppress weed growth, and regulate soil temperature. Spread a 2 to 3-inch layer of mulch, ensuring you keep it a few inches away from the plant’s stems to prevent rot.

  2. Weed control: Weeds can compete with creeping phlox for nutrients, water, and sunlight, so it’s essential to keep them under control. Regularly inspect the area around the plants and remove any weeds promptly. Be cautious while hand pulling weeds near the shallow root system of creeping phlox to avoid uprooting the plants accidentally. Using a weed barrier or applying pre-emergent herbicides can also help prevent weed growth.

  3. Dividing: Over time, creeping phlox may become overcrowded and lose vigor. Dividing the plants every 2-3 years can help rejuvenate them and promote better growth. Early spring, when new growth emerges, is the ideal time to divide creeping phlox. Dig up the clumps, separate them into smaller sections, and replant them in prepared soil.

Planting creeping phlox can add a burst of color and beauty to your garden. By purchasing healthy plants, preparing the soil, and following proper planting techniques, you can ensure the successful growth of this ground cover. Adequate watering, fertilizing in moderation, and controlling weeds through mulching and regular maintenance will help maintain the health and appearance of your creeping phlox plants. With proper care, you can enjoy the stunning blooms and lush green foliage of this versatile ground cover for years to come.

Pruning And Maintenance

Creeping phlox, scientifically known as Phlox subulata, is a delightful perennial ground cover that is highly valued for its colorful and fragrant blooms. Native to North America, this plant is loved by gardeners for its ability to form dense carpets of flowers and foliage, making it a perfect choice for rock gardens, border edges, or slopes.

RELATED  How To Plant Bush Rose [ Full Guide ]

To ensure the health and vitality of your creeping phlox, proper pruning and regular maintenance are essential. Here are some important tips to keep in mind:


  1. Timing: Pruning of creeping phlox is best done immediately after the blooming period, which typically occurs in early spring. This allows the plant enough time to develop new growth and flower buds for the next season.
  2. Deadheading: After flowering, remove the spent blossoms by cutting them back to the nearest healthy bud. This improves the plant’s appearance and prevents the formation of seeds.
  3. Shearing: Every two to three years, and occasionally even more frequently, give your creeping phlox a light shearing to promote fresh growth and maintain a compact shape. This can be done in early spring or immediately after flowering.


  1. Watering: Creeping phlox prefers slightly moist soil, but it also tolerates some drought once established. Water plants deeply and regularly during dry spells.
  2. Mulching: Apply a layer of organic mulch around your creeping phlox plants to retain soil moisture, suppress weed growth, and maintain a cool root environment.
  3. Fertilization: Once a year, in early spring before the flowering period, provide your creeping phlox with a balanced slow-release fertilizer. This will provide the necessary nutrients for healthy growth and abundant blooms.

Dealing With Common Pests And Diseases

While creeping phlox is generally a resilient and disease-resistant plant, it may occasionally encounter some pests or diseases. Here are some common issues and their solutions:


  1. Aphids: These small, soft-bodied insects can be removed by spraying the plants with a strong stream of water or by using insecticidal soap.
  2. Slugs and snails: These pests can be deterred by placing copper barriers or using organic slug and snail baits around your creeping phlox.


  1. Powdery mildew: This fungal disease appears as a white powdery coating on the leaves. To prevent and treat powdery mildew, ensure proper air circulation by spacing your plants adequately and avoiding overhead watering.
  2. Root rot: This can occur if the soil remains consistently waterlogged. To avoid root rot, ensure proper drainage and avoid overwatering your creeping phlox.
  3. Botrytis blight: Also known as gray mold, this disease can be prevented by avoiding overcrowding, providing good air circulation, and promptly removing any dead or decaying plant material.

It’s important to note that proper plant care, including regular maintenance, adequate watering, and good sanitation practices, can significantly reduce the likelihood of pests and diseases affecting your creeping phlox.

Propagation And Division

Creeping phlox can be propagated through various methods, including seed sowing, division, and stem cuttings. Here’s a step-by-step guide on each:

Seed Sowing

  1. Collecting seeds: After the blooming period, allow the flowers to fade and the seed heads to form. Once the seed heads have dried, collect and store the seeds in a cool, dry place.
  2. Stratification: Many creeping phlox seeds require a period of cold stratification to germinate. Place the seeds in a damp paper towel, seal them in a plastic bag, and refrigerate for 6-8 weeks.
  3. Sowing: After stratification, sow the seeds in a well-draining seed-starting mix, lightly cover them with soil, and keep the soil moist. Germination typically occurs within 2-3 weeks.
  4. Transplanting: Once the seedlings have developed a few true leaves, transplant them into individual pots or a prepared garden bed. Make sure to keep the young plants well-watered until they establish themselves.


  1. Timing: Division is best done in early spring or fall when the temperatures are mild, and the plants are not actively blooming.
  2. Preparing the plant: Dig up the entire clump of creeping phlox and gently shake off excess soil. Remove any dead or damaged portions of the plant.
  3. Separating the divisions: Carefully pull apart the clump, dividing it into individual sections. Each division should consist of healthy roots and several vigorous shoots.
  4. Replanting: Dig planting holes for each division, ensuring they are wide and deep enough to accommodate the roots. Place the divisions in the holes, backfill with soil, and firm it gently around the roots. Water thoroughly after planting.
RELATED  How To Plant Spinach From Seed [ Full Guide ]

Stem Cuttings

  1. Choosing stems: Select healthy and non-flowering stems from your creeping phlox plant. Cut 4-6 inch long sections just below a leaf node, using a clean and sharp knife or pair of scissors.
  2. Preparation: Remove the lower leaves from the stems, leaving only a few near the tip. Dip the cut ends in rooting hormone powder to encourage root development.
  3. Planting: Fill small pots with a well-draining potting mix and create planting holes with a pencil or your finger. Insert the cut ends of the stems into the holes, gently firm the soil around them, and water lightly.
  4. Care: Place the pots in a warm and brightly lit area, but out of direct sunlight. Keep the soil slightly moist and mist the cuttings regularly. Within a few weeks, roots should start to develop.

Remember to provide proper care and attention to the newly propagated plants until they establish themselves. This includes regular watering, protection from extreme weather conditions, and providing them with suitable growing conditions.

Benefits Of Planting Creeping Phlox

Planting creeping phlox in your garden offers several benefits, making it a fantastic addition to any landscape. Here are some reasons to consider incorporating this perennial ground cover:

  1. Beautiful blooms: Creeping phlox produces vibrant and fragrant flowers in shades of pink, purple, blue, and white. These colorful blooms add a cheerful and decorative touch to any garden.

  2. Ground cover: Creeping phlox forms a dense mat of foliage that effectively suppresses weed growth and helps conserve soil moisture. It acts as a natural ground cover, reducing the need for excessive manual weeding.

  3. Erosion control: The spreading nature of creeping phlox makes it an excellent choice for slopes and banks, where it can help stabilize the soil and prevent erosion.

  4. Low maintenance: Once established, creeping phlox requires minimal care. Its ability to tolerate some drought and its resilience against pests and diseases make it a low-maintenance and easy-to-grow plant.

  5. Wildlife attractant: The abundance of flowers in creeping phlox attracts pollinators such as bees and butterflies to your garden, helping to support local ecosystems.

  6. Versatility: Creeping phlox is a versatile plant that can be used in a variety of garden settings. It looks stunning in rock gardens, border edges, cascading over walls, or spilling out of containers.


Whether you’re looking to add a splash of color to your garden, control erosion on slopes, or simply create a low-maintenance ground cover, planting creeping phlox is an excellent choice. By following the proper techniques for pruning, maintenance, dealing with pests and diseases, and propagation, you can enjoy the beauty and benefits of this versatile plant for years to come. So go ahead and introduce creeping phlox to your garden, and watch as it transforms your landscape into a vibrant and alluring haven.


What Is Creeping Phlox?

Creeping phlox is a popular perennial plant that is known for its prolific and vibrant blooms that cover the ground like a blanket. It is low-growing and spreads quickly, making it a popular choice for ground cover in gardens and landscaping.

When Is The Best Time To Plant Creeping Phlox?

The best time to plant creeping phlox is in the spring, after the last frost has passed. This allows the plant to establish its root system and prepare for the warm summer months.

Where Should I Plant Creeping Phlox?

Creeping phlox thrives in full sun to partial shade, and it is important to choose a well-draining location as the plant is susceptible to root rot. It also does well in rocky or gravelly soil and can be planted in both garden beds and containers.

How Do I Prepare The Soil For Planting Creeping Phlox?

Before planting, loosen the top layer of soil to a depth of about 6 inches and mix in a layer of compost or organic matter. This will improve soil drainage and provide essential nutrients for the plant to thrive.

How Should I Care For My Creeping Phlox After Planting?

Once planted, water the creeping phlox regularly for the first few weeks to help it establish. After that, water deeply once a week, and more frequently during hot and dry periods. Fertilizer can be applied in the spring and summer, and it is important to prune back any damaged or dead stems to encourage new growth.