Origin:
Coreopsis occidentalis (Hutch. & Dalziel) C.D.Adams, commonly known as western tickseed, is a perennial herb native to North America. It is mainly found in the western United States, from Montana to California and eastward to northern Colorado and Wyoming. The plant grows in a variety of habitats, including open forests, meadows, grasslands, and rocky slopes.
Common Names:
Coreopsis occidentalis is known by several common names, including western tickseed, tickseed sunflower, and spotted coreopsis. The name “tickseed” comes from the shape of the seeds, which resemble small ticks.
Uses:
Coreopsis occidentalis has several medicinal properties. Native Americans used the plant to treat various ailments, such as fever, diarrhea, and stomachache. The roots and leaves were also used for their analgesic and anti-inflammatory properties. Additionally, the plant is used as an ornamental in gardens and landscaping due to its attractive yellow flowers and long blooming period, which lasts from mid-summer to early fall. Moreover, it is also a popular wildflower and is widely used in prairie restoration projects.
General Appearance:
Coreopsis occidentalis is a clump-forming perennial herb that grows up to 60 cm (24 in) tall and 45 cm (18 in) wide. The plant has a fibrous root system that helps it to survive drought. The leaves are narrow and lance-shaped, with a bluish-green color that contrasts with the bright yellow flowers. The flowers are daisy-like, with 7 to 12 ray petals surrounding a compact, flat center disk. The flowers are about 2.5 cm (1 in) in diameter and bloom from July to September. The plant produces numerous seeds, which are dispersed by wind or animals.
Light Requirements
Coreopsis occidentalis thrives in full sunlight exposure. This plant species requires about 6-8 hours of sun daily. In areas with harsh afternoon sunlight, the plant may need partial shade during this period. Inadequate sunlight may result in reduced plant growth, inadequate flowering, and susceptibility to diseases and pests.
Temperature Requirements
The ideal temperature range for Coreopsis occidentalis is between 65°F to 77°F. However, the plant species can tolerate moderately extreme temperatures. During summer, the plant can withstand high daytime temperatures of up to 90°F. The plant may experience dormancy under freezing winter conditions and may resume growth after the winter season.
Soil Requirements
Coreopsis occidentalis grows well in well-drained soils with a pH range of 6.0-7.0. Excessive water or poor drainage may lead to waterlogging, causing root rot. The plant can adapt to a wide range of soils, including loamy, sandy, and clay soils, as long as they have adequate drainage. Fertile soils, rich in organic matter, enhance plant growth and flowering.
Cultivation methods
Coreopsis occidentalis is a hardy plant that prefers full sun and can tolerate a wide range of soil types. It is best to plant in the spring after the last frost. The plant can grow up to two feet tall and two feet wide, so it is essential to space them about 12 inches apart to allow sufficient room for growth.
Watering needs
Although Coreopsis occidentalis is drought-tolerant, it requires deep watering during prolonged dry spells to encourage healthy growth. It's best to water the plant at the base instead of spraying the foliage. Avoid over-watering, which can lead to waterlogging and root rot. Check the soil for moisture content before watering to avoid over-watering.
Fertilization
Coreopsis occidentalis benefits from fertilization with a balanced fertilizer in the early spring when actively growing. Avoid over-fertilizing, which can lead to excessive growth and weak stems. If necessary, it's recommended to use a slow-release fertilizer applied according to the manufacturer's instructions.
Pruning
Pruning Coreopsis occidentalis is essential to encourage healthy growth and maintain an attractive shape. It's best to prune the plant to about half its height in late spring when new growth appears. Removing any dead or damaged growth is also essential to prevent the spread of disease. It is recommended to deadhead regularly to encourage new blooms and prolong the flowering season.
Propagation of Coreopsis Occidentalis
Coreopsis Occidentalis can be propagated through seeds, stem cuttings, or division.
Propagation through seeds:
The easiest and most common way to propagate Coreopsis Occidentalis is through seeds. Seeds can be sown directly in the ground in spring. The soil should be well-drained and moist. The seeds should be sown at a depth of 2-3 times their size. They should be spaced about 12-18 inches apart. The seeds will germinate in about 2-3 weeks.
Propagation through stem cuttings:
Coreopsis Occidentalis can also be propagated through stem cuttings. The cuttings should be taken in late spring or early summer. The stem cuttings should be about 4-6 inches long and have at least one leaf node. They should be rooted in a well-draining soil mix and kept moist until roots develop. Once rooted, the cuttings can be transplanted into the garden.
Propagation through division:
Coreopsis Occidentalis can be propagated through division in spring or fall. The plant should be lifted from the ground and the roots should be divided into small pieces. Each piece should have some roots and shoots. The divided plants should be planted in a well-drained soil mix and kept moist until established.
Disease and Pest Management for Coreopsis Occidentalis
Coreopsis occidentalis is a species of flowering plant that belongs to the Asteraceae family. It is native to North America and commonly known as western tickseed. This plant is relatively hardy and easy to grow, but can still fall victim to several diseases and pests. Here are some of the common diseases and pests that may affect Coreopsis occidentalis and ways to manage them.
Diseases
Coreopsis occidentalis is susceptible to several diseases that may stunt its growth and damage its leaves. The most common diseases that affect this plant include:
- Leaf Spot
- Rust
- Powdery Mildew
To manage these diseases, it is essential to remove and dispose of infected plant parts. You should also avoid overhead watering, as this can help spread the disease. In severe cases, fungicides may be necessary. Always read the label and follow the instructions on any fungicide used.
Pests
Coreopsis occidentalis may also be susceptible to pest infestations, which can weaken or even kill the plant. The most common pests that affect this plant include:
- Aphids
- Spider Mites
- Thrips
One of the best ways to control insect pests is through integrated pest management. This approach involves using a combination of cultural, physical, and biological control methods. For example, you can attract beneficial insects like ladybugs, which prey on aphids and other small insects. You can also physically remove pests by hand or use an insecticidal soap or oil spray.
Overall, proper maintenance and monitoring are essential to keeping Coreopsis occidentalis healthy and free of diseases and pests. Regularly inspect your plants for signs of damage or infestation and take appropriate action as needed.
