Origin
Phlox subulata L. ssp. australis (Wherry) Wherry is a species of flowering plant that belongs to the family Polemoniaceae. This plant is native to the southeastern region of the United States, including Texas, Louisiana, Mississippi, Alabama, Georgia, and Florida.
Common Names
Phlox subulata L. ssp. australis is commonly known as Southern moss phlox, or Creeping phlox. It gets its name, Creeping phlox, from the way the plant spreads horizontally through underground stems.
Uses
Phlox subulata L. ssp. australis is primarily used for ornamental purposes in gardens and landscapes. This plant is a popular ground cover option for sunny areas, hillsides, and rock gardens. Due to its creeping tendency, it is also used for erosion control.
General Appearance
The Phlox subulata L. ssp. australis is a perennial plant that typically reaches a height of 6 inches and spreads up to 2 feet. It has small, narrow leaves that are evergreen and needle-like. The flowers of this plant typically bloom in mid-to-late spring and come in shades of pink, lavender, and white. The flowers are small, measuring around 1 inch in diameter and have five petals. The plant prefers full sun exposure, well-draining soil, and moderate watering.
Light Requirements
Phlox subulata L. ssp. australis (Wherry) Wherry thrives in areas with full sun exposure. Ideally, they should receive at least six hours of direct sunlight each day. Failure to provide them with adequate sunlight results in spindly growth and a reduced number of flowers.
Temperature Requirements
The plant is hardy in USDA zones 3-9 and can withstand a range of temperatures. However, Phlox subulata L. ssp. australis (Wherry) Wherry does best in moderate temperatures between 60-70°F (15-21°C). If the temperature rises above 85°F (29°C), the plant is likely to experience heat stress and start to wilt. On the other hand, prolonged exposure to temperatures below 32°F (0°C) can damage the plant's foliage and flowers.
Soil Requirements
Phlox subulata L. ssp. australis (Wherry) Wherry can grow in a range of soil types, as long as the soil is well-draining and rich in organic matter. The plant grows best in slightly acidic to neutral soils with a pH range of 6.0-7.0. To ensure good drainage, it's recommended to add sand or perlite to the soil mix. Overly wet soil can suffocate the plant's roots and cause root rot, which can be fatal. Moreover, the plant is sensitive to soil compaction, so avoid planting it in heavy clay soils.
Cultivation Methods
Phlox subulata L. ssp. australis (Wherry) Wherry, also known as the creeping phlox, is a herbaceous perennial plant that thrives in well-draining soil with a pH of around 6.0-7.0. It prefers full sun to partial shade and needs enough space to spread out and grow.
The best time to plant it is in the spring or fall when the soil is still warm. To plant, dig a shallow hole, add some compost, and place the plant in the hole. Firm the soil around the base, making sure the plant is level with the surrounding soil.
Watering Needs
Phlox subulata L. ssp. australis (Wherry) Wherry requires moderate watering, particularly during its initial growth stages. It is advisable to water the plant when the soil is dry to the touch about an inch below the surface. However, take care not to overwater it as it does not tolerate excess water.
In case you are not sure about its water needs, it is best to observe its behavior. If the leaves appear wilted, the plant needs water, but if they are yellowish-green, then it's possible the plant is getting too much water.
Fertilization
The creeping phlox requires regular feeding to promote healthy growth and flowering. The best approach is to apply a slow-release granular fertilizer with a balanced NPK ratio, such as 10-10-10, at the beginning of the growing season – spring.
You can apply another round of fertilizer in mid-summer if necessary. However, be careful not to overfeed the plant as it can lead to excessive foliage growth rather than blooming.
Pruning
To maintain its shape and promote bushy growth, it's advisable to prune the creeping phlox annually just after it blooms. Use pruning shears to cut back the spent stems and remove any dead or damaged foliage.
If you need to control its growth and limit its spread, you can prune the plant even more significantly. However, avoid cutting back more than one-third of the plant's height or removing more than one-third of its foliage, as it can stress the plant.
Propagation of Phlox subulata L. ssp. australis (Wherry) Wherry
Phlox subulata L. ssp. australis (Wherry) Wherry, commonly known as Creeping Phlox, is a beautiful, evergreen ground cover plant that produces a carpet of vibrant blooms in shades of pink, white, and purple. It is a hardy plant that can survive in various soil conditions and is easy to grow. The propagation of Phlox subulata L. ssp. australis (Wherry) Wherry can be done using various methods.
Propagation from Seeds
Propagation of Phlox subulata L. ssp. australis (Wherry) Wherry from seeds is a good way to grow new plants. Collect the seeds from the mature flowers after they dry out and turn brown. Sow the seeds on the surface of a well-drained soil mix, cover them loosely with a thin layer of soil, and keep the soil moist. The seeds will germinate in 2-3 weeks. Once the seedlings develop two or three true leaves, transplant them to their final location, space them out, and water them regularly until they become well established.
Propagation from Cuttings
Propagation of Phlox subulata L. ssp. australis (Wherry) Wherry from cuttings is one of the easiest methods of propagation. Take cutting from any part of the plant during the growing season when the stems are supple. Cut the stems approximately 4-6 inches long, remove the lower leaves, and dip the cut ends in rooting hormone powder. Plant the cuttings in a well-drained soil mix, water well and keep them in a shady location. In a few weeks, they will develop roots and new leaves. Once they become well established, transplant them into their permanent location.
Propagation from Division
Propagation of Phlox subulata L. ssp. australis (Wherry) Wherry from division is another method that can be used to increase the number of plants. It is advisable to divide the plants in early spring before active growth begins or in autumn after the flowering period. Dig up the clump of plants, tease apart the root system with a fork or knife, and replant the sections in a well-drained soil mix. Ensure that each section has enough roots and foliage to support its growth. Water the transplants and keep them in a shaded location until they become well established before transplanting them to their permanent location.
Overall, Phlox subulata L. ssp. australis (Wherry) Wherry is a versatile plant that is easy to propagate using seeds, cuttings, and division. With proper care, it can become a stunning ground cover that spreads color and beauty in any garden.
Disease Management
Phlox subulata L. ssp. australis is susceptible to several diseases that can cause significant damage to the plant. Here are some common diseases and ways to manage them:
Phlox Mildew
Phlox mildew is a common fungal disease that affects the leaves of the plant, causing them to turn yellow and drop prematurely. To manage this disease, begin by removing all infected plant parts and debris. Ensure good air circulation around the plant and water only at the base of the plant, avoiding wetting the leaves. In severe cases, fungicides such as copper-based or neem oil-based products can be used.
Botrytis Blight
Botrytis blight is a fungal disease that affects the flowers and stems of the plant. It causes browning of the affected parts, followed by a gray mold. To manage this disease, promptly remove any infected plant parts and debris. Avoid overhead watering and ensure good air circulation around the plant. Fungicides can also be used if the disease does not respond to cultural practices.
Pest Management
Phlox subulata L. ssp. australis is also prone to attack by several pests. Here are some common pests and ways to manage them:
Spider Mites
Spider mites are small, sap-sucking pests that can cause significant damage to the plant, leading to stunted growth and reduced vigor. They thrive in hot, dry environments, so ensure adequate watering of the plant to prevent infestation. In severe cases, insecticidal soaps or oils can be used to manage the pests.
Whiteflies
Whiteflies are tiny, white insects that feed on the sap of the plant, causing yellowing and wilting of the leaves. To manage this pest, begin by physically removing as many of the insects as possible. Encourage natural predators such as ladybugs and lacewings to control the population. Insecticidal soaps or oils can also be used to manage severe infestations.
