Overview
Carpesium divaricatum, commonly known as dwarf carrot or crow garlic, is a perennial plant that belongs to the Asteraceae family. It is native to East Asia and can be found in China, Japan, Korea, and Taiwan. The plant prefers moist areas like ditches, fields, and wetlands.Description
Carpesium divaricatum has a branching stem that can grow up to 80 cm tall. The leaves are oval-shaped and can grow up to 10 cm long. The plant produces small yellow flowers that bloom from August to September, and the fruits are small seeds that are dispersed by the wind.Uses
Carpesium divaricatum has been used in traditional Chinese medicine to alleviate fever, relieve pain, and treat bruises. The plant contains several active compounds like flavonoids and phenolic acids that have antioxidant and anti-inflammatory properties. In addition, the plant has been used as a diuretic and a laxative.General Appearance
Carpesium divaricatum is a tall, slim plant that looks similar to a wild carrot. The stem is green and slightly hairy, and the leaves are dark green and glossy. The flowers are small and yellow, and the seed heads are compact and spiky. The plant has a slightly bitter taste and a pungent smell.Light Requirements
Carpesium divaricatum prefers partial to full sun exposure. However, it can grow in shaded areas, but the plant's height will be reduced. It is optimal to grow this plant in an area with moderate to bright light intensity.
Temperature Requirements
The ideal temperature range for the growth of Carpesium divaricatum is between 15°C to 25°C. It can tolerate a wide range of temperatures, from freezing temperatures to hot weather, but growth will be slow in extreme temperature conditions.
Soil Requirements
This plant species grows well in moist and well-drained loamy soil. The soil's pH should range from slightly acidic to slightly alkaline, with an ideal range between 6-7.5. Avoid planting in heavy clay or waterlogged soil, as it can cause root rot. Another recommendation is to add organic matter to the soil to improve its quality and help the plant to grow better.
Cultivation Methods
Carpesium divaricatum plant can be cultivated through seed propagation or transplanting seedlings. It thrives in well-draining, moist soil with full or partial sun exposure. The plant can be grown in a pot or directly in the garden, with the latter providing enough space for the plant to spread and develop.
Watering Needs
The plant requires frequent watering during the growing season, especially during the hot or dry months. Ensure that the soil stays moist but not waterlogged. It is advisable to water the plant in the morning, avoiding the leaves to prevent the development of fungal diseases.
Fertilization
To encourage the plant's growth and development, fertilization is necessary. An organic all-purpose fertilizer with a balanced nutrient composition can be applied during the growing season. Mixing the fertilizer with water and applying it to the soil can help in the plants' absorption of the nutrients. However, too much fertilizer can lead to excessive vegetative growth, which can weaken the plant.
Pruning
Carpesium divaricatum requires minimal pruning, but it is essential for maintaining its shape and encouraging the growth of lateral branches. Pruning can be done after flowering or during the dormant season to remove any dead or diseased branches. It is also advisable to cut back the plant's overall height to control its size and spread.
Propagation of Carpesium divaricatum
Carpesium divaricatum is commonly known as the spreading flaxseed or the butterweed. It is a perennial plant species and belongs to the Asteraceae family. The plant is native to Asia, including China, Japan, and Korea, and can also be found in North America. Propagation of Carpesium divaricatum can be achieved through several methods. Here are the most common ways:
Seed Propagation
One of the easiest ways to propagate Carpesium divaricatum is through seed propagation. The plant produces a large number of seeds, which can be collected from the inflorescence once they become ripe. The seeds should be sown in a seedbed or trays filled with well-draining soil. It is advisable to cover the seeds lightly with a fine layer of soil to avoid exposure to light, which can inhibit germination. The seedbed or tray should be kept moist but not waterlogged. Germination usually occurs within 2-3 weeks.
Division
Carpesium divaricatum can also be propagated through division. This method involves separating the plant into smaller sections and replanting them. Division is best done during the spring or fall when the plant is not in bloom. To propagate through division, carefully dig up the plant using a garden fork and divide the root clump into smaller sections. Each section should have a good portion of rhizome and a few shoots. The divided sections can then be replanted in well-draining soil and kept well-watered until they establish.
Cuttings
Carpesium divaricatum can also be propagated through stem cuttings. This method involves taking a stem cutting from an established plant and rooting it in a suitable rooting medium. The cutting should be taken during the growing season and should be around 4-6 inches long. Remove all the leaves except the top two or three, and make a clean cut at the base of the stem. Dip the cut end in rooting hormone to encourage root growth. Stick the cutting in a rooting medium such as a mixture of peat moss and sand and keep the soil moist. Roots should begin to develop in a few weeks, and the cutting can be transplanted to its permanent location once it has established.
By utilizing one or more of these propagation methods, growers can easily propagate Carpesium divaricatum and ensure a steady supply of this beautiful and useful plant.
Disease and Pest Management for Carpesium divaricatum
Carpesium divaricatum is a hardy plant that is relatively resistant to pests and disease. However, it may occasionally be affected by some common diseases and pests. Here are some of them:
Diseases
1. Powdery mildew: Powdery mildew is a fungal disease that affects many kinds of plants, including Carpesium divaricatum. It appears as a white powdery coating on the leaves, stems, and flowers.
Management: To manage powdery mildew, remove and destroy affected plant parts and provide good air circulation around the plants. Fungicides can also be effective in managing the disease.
2. Leaf spot: Leaf spot is a bacterial or fungal disease that appears as small, dark spots on the leaves, eventually causing them to turn yellow and drop off.
Management: To manage leaf spot, remove and destroy the affected leaves and avoid wetting the foliage when watering. Fungicides can be used as a preventive measure, but they are not effective once the disease has already set in.
Pests
1. Aphids: Aphids are small, soft-bodied insects that feed on the sap of plants. They can cause stunted growth, wilting, and yellowing of the leaves.
Management: To manage aphids, use a strong jet of water to knock them off the plant or apply insecticidal soap or neem oil. Ladybugs and lacewings are natural predators of aphids and can be introduced to the garden to help control their population.
2. Spider mites: Spider mites are tiny pests that feed on the sap of the plants, causing yellowing and stippling of the leaves. They can also produce fine webs around the plant.
Management: To manage spider mites, increase the humidity around the plant by misting it regularly. You can also wash them off the plant with a jet of water or use insecticidal soap or neem oil.
By taking prompt action when diseases and pests are first noticed, Carpesium divaricatum can be effectively managed and kept healthy.
