Origin
Symphyotrichum drummondii (Lindl.) Nesom var. texanum (Burgess) Nesom, commonly known as Drummond's aster or Texas aster, is a flowering plant native to North America. It is found in the southern United States, particularly in Texas, Oklahoma, and Louisiana.
Common Names
Drummond's aster, named after the Scottish botanist Thomas Drummond, is also commonly known as Texas aster, Drummond's American-aster, and Drummond's bog-aster.
Uses
A tea made from the roots of the plant has been used in traditional Native American medicine to treat skin issues, coughs, and fevers. The plant is also used in ornamental horticulture and can be a great addition to a wildflower garden.
General Appearance
Drummond's aster is a herbaceous perennial plant that typically grows 1-2 feet tall and wide. It has thin, hairy stems, and narrow leaves that are dark green in color and can be up to 3 inches long. The plant produces clusters of purple or pink, daisy-like flowers that bloom from late summer to early fall. These flowers are approximately 1 inch in diameter and have yellow centers. The plant prefers moist, well-drained soils and is often found near marshes or in damp meadows.
Light Requirements
Symphyotrichum drummondii var. texanum grows best in full sunlight. It requires at least 6 hours of direct sunlight each day to achieve optimal growth. If the plant is grown in shade, it may struggle to produce flowers and may become leggy.
Temperature Requirements
The plant is native to Texas and thrives in warm temperatures. It can tolerate temperatures that range from 30°F to 90°F, but it grows best in temperatures between 65°F and 85°F. It is important to protect the plant from frost as it cannot survive in freezing temperatures.
Soil Requirements
Symphyotrichum drummondii var. texanum prefers well-draining soil that is slightly acidic with a pH range of 5.5 to 6.5. The soil should be rich in organic matter and nutrients. The plant is adapted to grow in rocky soil, so adding sand or gravel to the soil mixture may help improve drainage. It is important to avoid over-fertilizing the plant as it can negatively affect its growth.
Cultivation Methods
Symphyotrichum drummondii (Lindl.) Nesom var. texanum (Burgess) Nesom is a hardy and adaptable plant that can grow in a wide range of conditions. It grows best in well-draining soil and requires full sun to thrive. Plant the seeds or young plants in the spring after the last frost has passed. It is important to space the plants at least 18 inches apart to provide ample room for growth.
Watering Needs
The watering needs of Symphyotrichum drummondii (Lindl.) Nesom var. texanum (Burgess) Nesom are moderate. The soil should be kept moist, but not waterlogged. Water the plants deeply once a week during the growing season, and reduce watering during the winter months. Avoid getting the leaves wet, as this can promote disease.
Fertilization
Symphyotrichum drummondii (Lindl.) Nesom var. texanum (Burgess) Nesom does not require a lot of fertilizer, but it can benefit from a slow-release, balanced fertilizer in the spring. Fertilizer can be applied every six to eight weeks during the growing season. Be sure to follow the manufacturer's instructions and do not over-fertilize, as this can damage the plant.
Pruning
Symphyotrichum drummondii (Lindl.) Nesom var. texanum (Burgess) Nesom requires minimal pruning. Dead and damaged stems should be removed as soon as they are noticed. Pinch back the tips of the stems in the early spring to promote bushier growth. It is also important to remove spent flowers to encourage further blooming.
Propagation of Symphyotrichum drummondii var. texanum
Symphyotrichum drummondii var. texanum, also known as Drummond's aster, can be propagated through a variety of methods. The most common propagation methods are through seed and through division of the root ball.
Propagation through Seed
Propagation through seed is the easiest and most common method of propagation for this plant. The seeds can be collected in the fall, once the flowers have finished blooming and the seed heads have dried out. Soak the seeds in water for 24 hours to soften the seed coat and remove any debris. Sow the seeds in a well-draining potting mix and keep the soil moist until the seeds germinate. Once the seedlings have developed several leaves, they can be transplanted into individual pots. The seedlings can be grown indoors under grow lights or outdoors in an area with partial shade.
Propagation through Division
Propagation through division of the root ball is another common method used to propagate Symphyotrichum drummondii var. texanum. The best time to divide the plant is in the spring, just as new growth begins to emerge. Dig up the plant carefully and use a sharp knife to divide the root ball into several sections. Replant each section in a well-draining potting mix or directly into the garden. Water well and keep the soil moist until new growth appears.
Disease Management
One common disease that affects Symphyotrichum drummondii var. texanum is Septoria leaf spot. This disease appears as circular grayish-brown lesions on the leaves, which may eventually cause the leaves to yellow and drop off. To manage this disease, remove and dispose of the infected leaves and avoid overhead watering which can spread the spores. Fungicides can also be used as a preventative measure.
Another disease that can affect this plant is powdery mildew. Symptoms include a white powdery growth on the leaves, causing them to shrivel and distort. Good air circulation and reducing humidity around the plant can prevent this disease. Fungicides can also be used to treat severe infections.
Pest Management
The most common pest on Symphyotrichum drummondii var. texanum is spider mites. These pests will suck the sap out of the leaves, causing yellowing and a stippled appearance. To manage spider mites, spray the plant with a strong stream of water to knock off the pests. Insecticidal soap or neem oil can also be used to control them.
Caterpillars may also be a problem, as they feed on the leaves and cause damage to the plant. Handpicking of the caterpillars or spraying with Bacillus thuringiensis (Bt) can control the infestation.
Lastly, aphids can also attack Symphyotrichum drummondii var. texanum, causing stunted growth and yellowing leaves. To manage aphids, blast the plant with a strong stream of water or use insecticidal soap or neem oil.
