Description
Machaeranthera canescens (Pursh) Gray var. monticola Dorn is a herbaceous plant that belongs to the sunflower family Asteraceae. It is commonly known as hoary tansyaster, mountain tansyaster, or hoary aster. This plant typically grows to a height of 12-24 inches and has numerous branching stems that are covered with glandular hairs.
Origin
Machaeranthera canescens var. monticola is native to the western United States, including Colorado, Montana, New Mexico, and Wyoming. It grows in a variety of habitats, including grasslands, sagebrush steppe, and montane meadows.
Uses
The hoary tansyaster has been used traditionally by Native American tribes for various medicinal purposes, including the treatment of colds, coughs, and fever. The leaves and stems of the plant are also used by some as a natural insect repellent. It has also been used for soil stabilization due to its deep-rooted system that can help prevent soil erosion.
General Appearance
The leaves of the hoary tansyaster are alternate, linear, and measure up to 2 inches in length. The flowers are lavender-blue in color, with 15-25 ray flowers surrounding a yellow disc in the center. They bloom from June to September and attract bees, butterflies, and other pollinators. The plant's overall appearance is bushy and compact, making it a great option for borders and rock gardens.
Light Requirements
Machaeranthera canescens (Pursh) Gray var. monticola Dorn requires full sun to thrive. The plant needs at least 6 hours of direct sunlight per day. Lack of enough sunlight may lead to stunted growth and a weak plant.
Temperature Requirements
This plant species is native to the mountainous regions of the western United States. The plant can tolerate a wide range of temperatures, but it thrives in cool to warm weather. The ideal temperature range for growth is between 60°F-80°F (16°C-27°C). Below 50°F (10°C) and above 90°F (32°C) temperatures can stress the plant and inhibit growth.
Soil Requirements
Machaeranthera canescens (Pursh) Gray var. monticola Dorn prefers well-draining soil. The plant can grow in various soil types, such as loam, sandy, or rocky soils. However, the soil must be slightly moist and slightly acidic (pH range of 6-7). The plant is drought-tolerant and can survive in dry conditions but may require occasional watering during the hot months.
Cultivation Methods
Machaeranthera canescens (Pursh) Gray var. monticola Dorn is a perennial plant that requires regular maintenance for proper growth. It can be grown from seeds or cuttings. However, it is recommended to propagate from seeds as it yields healthier plants. The ideal time for planting the seeds is in the spring when the soil is warm and moist.
The plant prefers well-draining soil that is rich in organic matter. It thrives in full sun or partial shade. The plant can tolerate different soil types, including sandy, loamy, and clay soils.
Watering Needs
The plant needs regular watering but can withstand drought conditions. It is recommended to water the plant two to three times a week during the growing season. However, the frequency should be reduced during the winter months. The plant does not tolerate waterlogging. It is advisable to avoid watering the plant when the soil is already wet.
Fertilization
The plant requires fertilization to supplement the soil's nutrients for healthy growth. It is recommended to use a slow-release fertilizer during the growing season. Alternatively, you can stimulate growth by applying an organic fertilizer once every two weeks. This will promote a healthier and more robust plant.
Pruning
Pruning Machaeranthera canescens (Pursh) Gray var. monticola Dorn is not necessary, but it helps to maintain its shape and reduce overgrowth. It is advisable to prune the plant in early spring before new growth appears. This will prevent excessive growth and encourage the development of new shoots. You can also remove dead or damaged stems to promote new growth.
Propagation of Machaeranthera canescens (Pursh) Gray var. monticola Dorn
Machaeranthera canescens (Pursh) Gray var. monticola Dorn, commonly known as Hoary Tansyaster, is a flowering plant native to North America. It is a perennial plant that grows well in full sunlight and well-drained soil. Propagation of this plant can be done easily through several methods.
Seed Propagation
The most common propagation method for Machaeranthera canescens (Pursh) Gray var. monticola Dorn is through seed propagation. The seeds of this plant can be sown directly in the garden soil in early spring or late fall. It is essential to choose a location with full sunlight and well-drained soil for seed propagation. The seeds of Hoary Tansyaster require proper moisture and temperature to germinate. They usually germinate within one to two weeks after sowing.
Division Propagation
Division propagation is another method that can be used to propagate Machaeranthera canescens (Pursh) Gray var. monticola Dorn. It is usually done during the spring when the plant starts to grow again. The division process involves digging up the established plant and then dividing its root ball into several sections. It is vital to ensure that each section consists of both roots and shoots before replanting them into a new location.
Cuttings Propagation
Cuttings propagation is a less common method used to propagate Machaeranthera canescens (Pursh) Gray var. monticola Dorn. It involves taking cuttings of the plant and then replanting them in a new location. The cuttings should be taken during spring when the plant is actively growing. They should be about six inches in length and should consist of both stems and leaves. The cuttings should be planted in a pot with moist soil and kept in a warm and humid place until they root.
In conclusion, Machaeranthera canescens (Pursh) Gray var. monticola Dorn can be propagated through several methods, including seed propagation, division propagation, and cuttings propagation. Each method requires specific conditions, and it is essential to choose the best one based on your preference and experience.
Disease Management
Machaeranthera canescens var. monticola is generally known for being a hardy and disease-resistant plant. However, there are still some diseases that could affect its growth and development.
1. Root Rot
Root rot is caused by overwatering or poorly drained soil. When the soil is waterlogged, the roots of the plant will start to rot, leading to a brown and mushy stem. To prevent root rot, make sure to plant the Machaeranthera canescens var. monticola in well-drained soil and avoid overwatering. If your plant already has root rot, consider repotting it in fresh and well-draining soil.
2. Powdery Mildew
Powdery mildew is a fungal disease that appears as a white powdery substance on the leaves and stems of the plant. This disease thrives in warm and humid conditions, so make sure to keep the plant well-ventilated. To treat powdery mildew, remove any infected parts and spray the plant with a fungicide. Preventive measures can also be taken by spacing the plants properly and avoiding overhead watering.
Pest Management
In addition to diseases, pests can also cause damage to the Machaeranthera canescens var. monticola. Below are some common pests and ways to manage them.
1. Aphids
Aphids are tiny, pear-shaped pests that suck the sap from the leaves of the plant. They can cause yellowing or browning of the leaves and can even transmit viruses to the plant. To control aphids, you can spray the plant with insecticidal soap or use natural predators like ladybugs.
2. Spider Mites
Spider mites are tiny pests that are difficult to see with the naked eye. They suck the sap from the leaves of the plant, causing yellowing and browning. They also produce webs that can cover the leaves. To control spider mites, spray the plant with water regularly to increase humidity, or use insecticidal soap or neem oil.
3. Thrips
Thrips are small, slender insects that suck the sap from the leaves of the plant, causing them to distort or curl. They can also transmit viruses to the plant. To control thrips, you can use sticky traps or insecticidal soap. You can also prune the affected parts of the plant to prevent the spread of the pests.
