Overview: Machaeranthera canescens (Pursh) Gray ssp. glabra (Gray) B.L. Turner var. aristata (Eastw.) B.L. Turner
Machaeranthera canescens subsp. glabra var. aristata, also known as Aristate Prairie Aster, is a plant species that belongs in the family Asteraceae. It is native to North America and can be found in western parts of the United States and Canada.
General appearance:
The Aristate Prairie Aster features a slender, upright stem that grows up to 1 meter tall. The leaves are long and narrow, gray-green in color with hairs on the underside of the leaf. The plant produces beautiful lavender-blue to purple flowers that bloom in the late summer, displaying the daisy-like petals in full glory.
Common names and Varieties:
The Aristate Prairie Aster is commonly known as the Desert Aster, Desert Blue Aster, and Bare-stemmed Aster. The plant has many varieties which include glabra, which is almost hairless, and canescens, which is hairy and woolly.
Uses:
The plant has various medicinal uses, including treating gastrointestinal disorders, and an infusion of the leaves can be taken to induce sweating and lower fever. Additionally, the plant can be used as a decorative element in gardens and landscaping. It can attract butterflies and other pollinators, and it is relatively easy to plant from seed.
Overall, the Aristate Prairie Aster is a hardy and beautiful plant that has many practical uses. Whether for medicinal purposes or decorative landscaping, this plant is sure to impress and provide multiple benefits.
Growth Conditions for Machaeranthera canescens (Pursh) Gray ssp. glabra (Gray) B.L. Turner var. aristata (Eastw.) B.L. Turner
Light: Machaeranthera canescens requires full sun to partial shade for optimal growth. The plant can tolerate some shade, but it may result in reduced flowering.
Temperature: This plant is adapted to a range of temperatures, but it grows best in areas with a warm and dry climate. The optimal temperature range for growth is between 70-85°F (21-29°C).
Soil: Machaeranthera canescens prefers well-draining soils that are sandy or rocky. The plant can tolerate a range of soil types, from acidic to alkaline. However, it does not grow well in heavy clay soils that retain moisture.
Moisture: This plant is adapted to arid and semi-arid conditions and can tolerate drought. However, it does require some moisture to grow, and regular watering during the growing season can promote better flowering.
Nutrients: Machaeranthera canescens is a low-maintenance plant that does not require high levels of nutrients. However, it can benefit from an occasional application of a balanced fertilizer during the growing season to promote better growth and flowering.
Cultivation
Machaeranthera canescens (Pursh) Gray ssp. glabra (Gray) B.L. Turner var. aristata (Eastw.) B.L. Turner grows well in well-drained soil that is slightly acidic to neutral. It is a hardy plant that can tolerate drought and heat. It is best to plant the Machaeranthera canescens in the spring season, after the last frost.
Watering Needs
Machaeranthera canescens requires moderate watering. This plant can be allowed to dry out between watering sessions, but excessive drought should be avoided. Water when the soil surface appears dry, and avoid wetting the foliage when watering the plant.
Fertilization
It is recommended to feed Machaeranthera canescens during the growing season with a balanced fertilizer. The fertilizer should be applied every four weeks to boost growth and improve blooming. During the dormant season, fertilizer application should be stopped.
Pruning
Machaeranthera canescens requires minimal pruning. Deadheading the spent blooms will encourage the growth of new flowers. Any damaged or dead stems should be removed to promote plant health and maintain the plant's size and shape. Pruning should be done in the fall season.
Propagation of Machaeranthera canescens ssp. glabra var. aristata
Machaeranthera canescens ssp. glabra var. aristata is commonly propagated through seeds and vegetative cuttings.
Propagation by Seeds
The seeds of Machaeranthera canescens ssp. glabra var. aristata can be easily germinated in a standard seed starting mix. Sow the seeds at a depth of 1/8 inch in the soil, lightly cover with the mix and keep them moist until germination. The optimal temperature range for the germination of these seeds is 60-70 degrees Fahrenheit. Water the seedlings regularly and avoid overwatering to prevent fungal infections.
Propagation by Cuttings
Vegetative cuttings are the best method for propagation of Machaeranthera canescens ssp. glabra var. aristata. Collect cuttings in spring or early summer, making sure that each cutting is at least three inches long and has at least two nodes. Remove the lower leaves from the cutting, leaving only the top two leaves. Dip the base of the cutting in rooting hormone and plant in a well-draining potting mix or soil. Water the cutting and cover the pot with a plastic bag or dome to maintain humidity and prevent the cutting from drying out. Remove the cover once the cutting has developed roots.
Disease Management for Machaeranthera Canescens
Machaeranthera canescens is generally a hardy plant that is not prone to many diseases. However, there are a few fungal and bacterial diseases that can affect the plant, including:
- Root rot: This disease is caused by various fungi and can cause wilting, yellowing, and stunted growth. To manage root rot, make sure the plant is in well-draining soil and avoid overwatering.
- Leaf spot: This fungal disease causes brown or black spots on leaves. Remove infected leaves and treat the plant with a fungicide.
- Blister rust: This fungal disease causes blister-like growths on stems and can cause the plant to weaken and eventually die. Remove infected areas and treat with a fungicide.
Pest Management for Machaeranthera Canescens
Like most plants, Machaeranthera canescens is vulnerable to attacks from various pests. Here are some of the most common pests that may affect the plant:
- Aphids: These small, pear-shaped insects can cause curling or wilting of leaves, as well as stunted growth. Treat with an insecticidal soap or neem oil.
- Spider mites: These tiny pests can cause leaf yellowing and stippling. Treat with an insecticidal soap or miticide.
- Leaf-miners: These insect larvae tunnel through leaves, causing brown or white blotches. Remove affected leaves and treat with an insecticide.
- Caterpillars: These pests can eat through leaves and stems, causing significant damage to the plant. Remove by hand or treat with an insecticide.
When dealing with pests and diseases, it's important to monitor your plant regularly to catch any issues early. Also, be sure to follow instructions carefully when using pesticides or fungicides, as overuse can harm the plant and surrounding environment.
