Overview
Phlox divaricata L. ssp. divaricata, commonly known as wild blue phlox or woodland phlox, is a flowering perennial plant that is native to eastern North America.
Description
Phlox divaricata L. ssp. divaricata is a low-growing plant that typically reaches a height of 6-12 inches (15-30 cm) and a spread of 12-18 inches (30-45 cm). It produces clusters of small, fragrant, pale blue to lavender flowers with five petals that bloom in early spring and continue through the early summer months. The leaves are lance-shaped and arranged oppositely on the stems.
Uses
Phlox divaricata L. ssp. divaricata is a popular ornamental plant in gardens and landscapes due to its attractive flowers and ability to thrive in shady areas. It is often used in woodland gardens, rock gardens, and along borders or pathways. Additionally, the flowers of Phlox divaricata are a source of nectar for various pollinators, including bees and butterflies.
Cultivation
Phlox divaricata L. ssp. divaricata prefers moist, well-drained soil in partial to full shade. It can tolerate some sun, especially in cooler climates. It is a relatively low-maintenance plant and should be watered regularly, especially during dry spells. The plant can be propagated from seed or division, and should be pruned back after flowering to encourage bushier growth.
Light Requirements
The Phlox divaricata L. ssp. divaricata plant typically prefers partial shade to full shade. In areas with hotter climates, they may require more shade to prevent the plant from drying out. If grown in direct sunlight, the leaves may become dull or damaged.
Temperature Requirements
The Phlox divaricata L. ssp. divaricata plant typically prefers a cool and moist environment. In general, this plant can withstand sub-zero temperatures if adequately protected from strong winds. These plants thrive in temperatures ranging from 60 to 75 degrees Fahrenheit (15.5 to 24 degrees Celsius). Extreme heat and drought stress the plant and may stunt its growth.
Soil Requirements
The Phlox divaricata L. ssp. divaricata plant typically prefers well-drained, moist soil. These plants prefer slightly acidic soil with a pH range of 5.0 to 7.0. They thrive in humus-rich soil and may require additional mulch to retain moisture. Make sure the soil has good drainage because poorly drained soil can cause root diseases. These plants can thrive in rocky soil, which mimics their natural habitat in woodland areas.
Cultivation
Phlox divaricata L. ssp. divaricata, commonly known as woodland phlox, is a beautiful perennial that grows best in a woodland setting. It prefers a well-draining, slightly acidic soil with partial to full shade.
This plant is relatively low-maintenance, making it an excellent choice for novice gardeners. It can be grown from seed, but it is more commonly propagated through division in early spring or autumn. The plant can be divided every three to four years to maintain its health and vigor.
Watering Needs
Woodland phlox prefers evenly moist soil, so it is important to keep the soil consistently damp but not waterlogged. Watering should be done at the base of the plant to avoid getting the leaves and flowers wet, as this can lead to fungal diseases. During periods of drought, regular deep watering is recommended.
Fertilization
Woodland phlox doesn't require a lot of fertilization, but a light application of a balanced slow-release fertilizer can be helpful in early spring. Avoid using high-nitrogen fertilizers, as they can promote leaf growth at the expense of flowers.
Pruning
Deadheading (removing spent flowers) can help extend the blooming period of woodland phlox. Pruning should be done in early spring before new growth begins. Trim back any dead or damaged stems, and cut the remaining stems back by about half to encourage bushier growth.
After blooming, the plant may also benefit from a light shearing to remove any straggly stems and promote a more compact growth habit.
Propagation of Phlox divaricata L. ssp. divaricata
Phlox divaricata L. ssp. divaricata can be propagated through various methods:
Seed Propagation
Phlox divaricata L. ssp. divaricata can be grown from seeds, but it requires a longer time to establish. Sow the seeds in a well-draining soil mix, covering them lightly with soil, and keeping them moist. The germination time is around two to three weeks, with spring as the best time to sow the seeds.
Division Propagation
The easiest method of propagation for Phlox divaricata L. ssp. divaricata is through division. Divide the clumps of mature plants every three to four years in early spring or fall, and replant them in well-draining soil. Water them thoroughly after planting to help the roots establish.
Stem Cutting Propagation
Propagating Phlox divaricata L. ssp. divaricata through stem cuttings is also an option. Take the cuttings during late spring or early summer and make sure they have at least three sets of leaves. Remove the lower leaves and plant them in a soil mix blend of sand and peat. Keep the soil moist by misting the cuttings and cover them with a plastic bag to maintain humidity.
Disease and Pest Management for Phlox divaricata L. ssp. divaricata
Phlox divaricata L. ssp. divaricata, commonly known as woodland phlox, is a perennial herbaceous plant native to North America. While the plant generally remains healthy with minimal care, it can face a few diseases and pests that may affect its growth and vigor. Here are some common diseases and pests that may affect Phlox divaricata and tips on how to manage them.
Common Diseases
Powdery mildew: Powdery mildew is a fungal disease that can strike Phlox divaricata, leading to the appearance of a white powdery substance on the leaves. This disease can reduce the plant's growth and flowering capabilities. The disease often occurs in areas with high humidity or poor air circulation. You can manage powdery mildew by removing infected leaves promptly and avoiding overhead irrigation. Improve air circulation around the plant, and apply a fungicide to the plant during the early stages of the disease.
Root rot: Root rot is a common disease that can affect Phlox divaricata and is commonly caused by soil-borne fungi. The disease is characterized by yellowing of the leaves in the plant's upper portion, leading to stunted growth and wilting. To control root rot, avoid over-watering the plant, improve soil drainage, and remove infected plant material. Use a fungicide only as a last resort.
Common Pests
Spider mites: Spider mites are tiny pests that suck plant sap and cause yellowing and mottling of the leaves, leading to reduced growth and flowering. You can control spider mites by regularly spraying the plant with water to improve humidity and minimize their presence. Use insecticides or miticides when population levels are high.
Slugs and snails: Slugs and snails are common pests that can damage the leaves of Phlox divaricata by leaving holes. To manage slugs and snails, you can set up barriers around the plant, remove nearby weeds, and apply a molluscicide to the plant or soil in the evening when the pests are most active.
Phlox divaricata is a beautiful plant that adds color and texture to any garden. By being vigilant and proactive in disease and pest management, you can keep your Phlox divaricata healthy and looking good.
