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Aster

Asters and Symphyotrichums are two closely related genera of flowering plants that bring a vibrant splash of color to gardens with their beautiful, daisy-like flowers. These plants, native to North America and Eurasia, offer a wide variety of colors, sizes, and forms, making them a favorite choice for gardeners of all skill levels. Asters and Symphyotrichums are relatively easy to grow and care for , making them a popular choice for both novice and experienced gardeners.

What Makes Asters and Symphyotrichums Special? Asters and Symphyotrichums have many features that make them special. They are known for their late-season blooms, which provide a welcome splash of color in the garden when many other plants have finished flowering. These blooms are a valuable source of nectar for pollinators, such as bees and butterflies, which are essential for a healthy garden ecosystem. As a late-season food source, asters are especially important for migrating Monarch butterflies as they journey south for the winter. Asters are also the birth flower for September and are associated with the 20th wedding anniversary.

In ancient Greece, asters were incorporated into wreaths used to honor gods and goddesses. According to ancient folklore, burning aster leaves was believed to release a smoke that could drive away serpents and evil spirits. English and German legends even stated they held magical powers! Asters are also known as the Michaelmas daisy because they tend to bloom around the autumn equinox, which coincides with the feast of St. Michael. In addition, Asters and Symphyotrichums are relatively low-maintenance plants that are resistant to deer and rabbits.

Description and Details Asters and Symphyotrichums are herbaceous perennials that typically grow to be between 1 and 30 inches tall. They are fast-growing plants with simple, alternate leaves that are often lance-shaped or heart-shaped. The flowers are daisy-like, with a central disk surrounded by numerous ray florets. The blooms come in a variety of colors, including white, pink, purple, blue, and red.

Asters carry rich symbolism, often representing love, faith, wisdom, patience, and valor. Their varied colors add layers of meaning:

  • Purple asters symbolize wisdom, nobility, and admiration.
  • Pink asters represent love and sensitivity.
  • White asters convey purity, innocence, and new beginnings.
  • Blue asters signify calmness, trust, and loyalty.

Asters and Symphyotrichums are members of the Asteraceae family, which is one of the largest families of flowering plants. The Asteraceae family includes other popular garden plants, such as sunflowers, daisies, and chrysanthemums.

The genus Aster was once much larger, containing nearly 600 species. However, after morphologic and molecular research on the genus during the 1990s, it was decided that the North American species are better treated in a series of other related genera. The North American species have now been reclassified in the genera Almutaster, Canadanthus, Doellingeria, Eucephalus, Eurybia, Ionactis, Oligoneuron, Oreostemma, Sericocarpus, and Symphyotrichum.

Native Habitat Asters and Symphyotrichums are native to North America and Eurasia. They are typically found in meadows, prairies, and open woodlands. The plants prefer full sun to partial shade and moist, well-drained soil. They are adaptable to different soil types, growing in locations ranging from mountaintops to the ocean's coast.

Landscaping Design Tips Asters and Symphyotrichums are versatile plants that can be used in a variety of garden settings. They are a popular choice for borders, meadows, and naturalized areas. The plants can also be used in containers. Here are some tips for using Asters and Symphyotrichums in the landscape:

  • Plant asters in full sun to partial shade.
  • Choose a location with moist, well-drained soil.
  • Space plants according to their mature size.
  • Combine asters with other late-blooming perennials, such as goldenrods and sedums.
  • Use asters to create a mass planting for a dramatic effect.
  • Plant asters in containers for a splash of color on patios and decks.
  • If you want to use asters as a natural pest repellent near your vegetable garden, plant them in containers and place them around the perimeter of your garden. They are especially adept at repelling mosquitoes and carrot flies.

Planting and Care Asters and Symphyotrichums are relatively easy to grow and care for. Here are some basic planting and care instructions:

Soil Preparation Asters and Symphyotrichums prefer well-drained soil that is moderately rich in organic matter. A pH level of 5.8 to 6.5 is ideal.

Planting Depth When planting asters from seed, sow them 1 inch deep in pots or flats and refrigerate them for 4 to 6 weeks to simulate winter dormancy. This cold period will kick-start germination.

When planting asters from nursery starts, dig a hole twice the diameter of the nursery pot. Add compost to the soil to improve drainage. Remove the plant from the nursery container and set it in the hole at the same height it was in the nursery container. Backfill with soil and compost and press down to remove air bubbles.

Watering Needs Asters and Symphyotrichums prefer moist soil, but they can tolerate some drought once established. Water new plants regularly, and water established plants during dry periods.

Pruning Techniques Asters and Symphyotrichums do not require regular pruning. However, you can pinch back the stems in early summer to encourage bushier growth. You can also deadhead the flowers to prolong the blooming period.

Pest and Disease Control Asters and Symphyotrichums are generally pest- and disease-resistant. However, they can be susceptible to powdery mildew. To prevent powdery mildew, provide good air circulation around the plants and avoid overhead watering.

Varieties of Asters and Symphyotrichums There are many different varieties of Asters and Symphyotrichums available, with a wide range of colors, sizes, and forms. Here are a few popular varieties:

Common Name

Scientific Name

Description

Preferred Growing Conditions

Hardiness Zones

New England aster

Symphyotrichum novae-angliae

A tall aster with purple or pink flowers.

Full sun to part shade, moist, well-drained soil

4-8

New York aster

Symphyotrichum novi-belgii

A shorter aster with blue, purple, or pink flowers.

Full sun to part shade, moist, well-drained soil

4-8

Heath aster

Symphyotrichum ericoides

A low-growing aster with white flowers.

Full sun, well-drained soil

3-8

Aromatic aster

Symphyotrichum oblongifolium

An aster with fragrant leaves and blue-violet flowers.

Full sun, dry to medium moisture, well-drained soil

3-8

Smooth aster

Symphyotrichum laeve

An aster with smooth stems and blue-green leaves.

Full sun, dry to medium moisture, well-drained soil

3-8

Wood aster

Eurybia divaricata

A shade-tolerant aster with white flowers.

Part shade, moist, well-drained soil

4-8

Specific Needs and Uses of Different Varieties White sage (Artemisia ludoviciana) is a variety with specific needs and uses. It was traditionally used for cleansing and purification. The smoke from burning white sage was used to purify people, spaces, and objects in various ceremonies. White sage tea was also used for stomach troubles and other ailments.

Medicinal Uses Asters have been used traditionally for their medicinal properties. They have been used to treat a variety of ailments, including earaches, gas pains, stomach aches, and fevers. Asters were also used as a steam inhalation to clear sinuses and dispel congestion.

Potential Invasiveness Some species of Asters and Symphyotrichums can be invasive in certain areas. For example, white wood aster (Eurybia divaricata) can spread aggressively by underground rhizomes. If you are concerned about invasiveness, choose a variety that is known to be well-behaved in your area.

Asters and Symphyotrichums are beautiful and versatile plants that are a great addition to any garden. With their late-season blooms, attractive flowers, and low-maintenance nature, these plants are sure to please gardeners of all levels of experience. They are valuable additions to gardens not only for their beauty but also for their ability to support pollinators and wildlife. Whether used in borders, meadows, naturalized areas, or containers, asters and symphyotrichums bring a touch of autumnal splendor to any garden setting.