Origin and Common Names
Erigeron engelmannii A. Nels. ssp. davisii Cronq., commonly known as Davis’ fleabane, is a native plant in the western region of North America. It can be found in California, Nevada, and Oregon at elevations from 1,300 to 8,500 feet (400 to 2,600 m).
Appearance
Davis’ fleabane is a perennial herbaceous plant with numerous flower heads that can grow up to 40 inches (1 meter) tall. The plant’s stems are typically hairy, with elliptical to lanceolate leaves at the base that can be up to 8 inches (20 cm) long. The flower heads are white to pinkish and small, usually about 1/2 inch (1 cm) wide, with yellow centers. The plant blooms from May to August.
Uses
Davis' fleabane has been traditionally used by Indigenous populations as a tea, though there is little research on its medicinal properties. In modern times, the plant has become a popular ornamental plant due to its showy flowers and its ability to attract butterflies and bees.
Light Requirements
Erigeron engelmannii A. Nels. ssp. davisii Cronq. has a relatively flexible light requirement. In general, it can grow in full sun to partial shade. However, the plant seems to prefer areas that receive at least partial sun. If grown in shady areas, the plant may struggle to thrive and may have stunted growth.
Temperature Requirements
Erigeron engelmannii A. Nels. ssp. davisii Cronq. is a hardy and resilient plant that can grow in a variety of temperature conditions. Generally, the plant prefers cool to mildly warm temperatures. The optimum temperature for growth is between 13 and 27°C (55-80°F).
Soil Requirements
The plant can thrive in a variety of soil types, but it prefers well-draining soil. The soil should not be too acidic or too alkaline, and it should be enriched with nutrients for proper growth. The plant can tolerate some drought conditions, but it prefers to be consistently watered, especially in hot, dry weather.
Cultivation
Erigeron engelmannii A. Nels. ssp. davisii Cronq. is a low-maintenance plant and can be easily grown in a variety of soil types, including sandy, loamy, or clay soils. It prefers well-draining soil and thrives in full sun to partial shade.
The plant is well-suited for rock gardens, containers, and mass plantings. While it is tolerant of drought, it thrives in areas with consistent moisture.
Watering Needs
Erigeron engelmannii A. Nels. ssp. davisii Cronq. requires moderate watering. Ensure that the soil is moist but not waterlogged. Water the plant when the top 1-2 inches of soil feels dry to the touch.
The plant is drought-tolerant and can survive in dry conditions. However, it is advisable to water it regularly to maintain a healthy-looking foliage and prolonged blooming period.
Fertilization
Erigeron engelmannii A. Nels. ssp. davisii Cronq. does not require heavy fertilization. However, it is recommended to incorporate a slow-release fertilizer in the soil during planting. This will release nutrients to the plant over an extended period.
If the plant shows signs of stunted growth or nutrient deficiency, apply a balanced, water-soluble fertilizer to the soil in spring and mid-summer.
Pruning
Erigeron engelmannii A. Nels. ssp. davisii Cronq. is a low-growing plant and does not require frequent pruning. However, removing spent flowers promotes continuous blooming during the growing season.
Prune the plant in the early spring to remove any damaged or broken stems. You can trim its foliage back by a third to encourage bushy growth and maintain its compact shape. Avoid pruning the plant in the fall, as it can stimulate new growth that is vulnerable to frost damage.
Propagation of Erigeron engelmannii A. Nels. ssp. davisii Cronq.
Erigeron engelmannii A. Nels. ssp. davisii Cronq. can be propagated through various methods including seeds, division, and stem cuttings. Each method has its own advantages and disadvantages, and it is important to choose the appropriate method for your needs and preferences.
Propagation by Seeds
Propagation of Erigeron engelmannii A. Nels. ssp. davisii Cronq. by seeds is the easiest and most common method. The best time to sow the seeds is in the late fall, early winter, or early spring when the temperatures are cooler. The seeds should be sown on well-draining and organic-rich soil, covered lightly with soil, and kept moist until germination.
Propagation by Division
Propagation of Erigeron engelmannii A. Nels. ssp. davisii Cronq. by division is a simple method that involves dividing the plants into smaller sections. The best time to divide the plants is in the fall or early spring when the plant is dormant. Carefully dig out the clumps and divide them into smaller sections, each containing roots and shoots. Plant the sections into well-draining and organic-rich soil and keep them moist until they develop roots.
Propagation by Stem Cuttings
Propagation of Erigeron engelmannii A. Nels. ssp. davisii Cronq. by stem cuttings is a bit more challenging but can give faster results. The best time to take cuttings is in the late spring or early summer when the plant is actively growing. Cut 2-3 inch long pieces of stem from the tips of the plant, remove the lower leaves, and dip the cut end into rooting hormone powder. Stick the cuttings into well-draining and organic-rich soil and cover with plastic to increase humidity. Keep the soil moist until the cuttings develop roots and start growing new shoots.
Disease and Pest Management for Erigeron engelmannii A. Nels. ssp. davisii Cronq.
Erigeron engelmannii A. Nels. ssp. davisii Cronq. is a stunning plant that is known for its pink daisy-shaped flowers. However, as with any other plant, it is susceptible to various diseases and pests that can damage or even kill the plant. Effective management of these diseases and pests is essential for the health and longevity of the plant.
Common Diseases
The most common diseases affecting Erigeron engelmannii A. Nels. ssp. davisii Cronq. include:
- Powdery Mildew: This fungal disease appears as a white powder on the leaves and stems of the plant. It can be managed by removing and destroying any infected plant parts, increasing air circulation around the plant, and using a fungicide
- Rust: This fungal disease appears as small orange or brown spots on the leaves. It can be managed by removing and destroying any infected plant parts, increasing air circulation around the plant, and using a fungicide
- Root Rot: This fungal disease affects the roots of the plant and can cause yellowing, wilting, and death of the plant. It can be managed by ensuring proper soil drainage, avoiding over-watering, and using a fungicide
Common Pests
The most common pests affecting Erigeron engelmannii A. Nels. ssp. davisii Cronq. include:
- Aphids: These tiny insects suck the sap from the plant and cause yellowing and curling of the leaves. They can be managed by spraying the plant with a strong jet of water or using an insecticidal soap
- Spider Mites: These pests are barely visible to the naked eye and can cause yellowing and curling of the leaves. They can be managed by spraying the plant with a strong jet of water or using a miticide
- Slugs and Snails: These pests feed on the leaves and flowers of the plant, leaving large holes and slime trails. They can be managed by handpicking them off the plant or using a slug bait
Effective disease and pest management for Erigeron engelmannii A. Nels. ssp. davisii Cronq. involves regular monitoring of the plant, prompt identification and treatment of any issues, and proper cultural practices such as pruning, fertilizing, and watering. By following these guidelines, you can help keep your plant healthy and vibrant.
