Aster Novi-belgii ‘Royal Ruby’ (New York Aster)

Plant: Table of Contents

Aster novi-belgii ‘Royal Ruby’ (New York Aster)

In the world of ornamental garden plants, the Aster novi-belgii ‘Royal Ruby’, commonly known as the New York Aster, holds a special place. Its striking beauty and resilience make it a popular choice for gardeners looking to add a burst of color to their landscape. In this comprehensive guide, we will explore the various aspects of this stunning plant, including its culture, uses, maintenance, and much more.

What is Aster novi-belgii ‘Royal Ruby’ (New York Aster)?

Aster novi-belgii ‘Royal Ruby’ is a herbaceous perennial plant that belongs to the Asteraceae family. This stunning cultivar is a hybrid, developed from a native North American species. It is characterized by its profusion of daisy-like flowers that bloom in shades of ruby red, creating a mesmerizing visual display. The plant typically reaches a height of 18-24 inches and spreads to about 24-36 inches, making it an ideal choice for borders, containers, and rock gardens.

Key Takeaways – Aster novi-belgii ‘Royal Ruby’ (New York Aster)

Here are some key takeaways about this magnificent plant:

  • Scientific Name: Aster novi-belgii ‘Royal Ruby’
  • Common Name: New York Aster
  • Family: Asteraceae
  • Plant Type: Herbaceous Perennial
  • Bloom Color: Ruby Red
  • Height: 18-24 inches
  • Spread: 24-36 inches

Now that we have an overview of the plant, let’s delve into the specific aspects of its care and cultivation.


Cultivating Aster novi-belgii ‘Royal Ruby’ requires a good understanding of its specific cultural needs. Let’s explore the key cultural considerations for this plant.


The New York Aster is a versatile plant with several potential uses in the garden and landscape. Some common uses include:

  • Border Plant: The vibrant blooms of the New York Aster make it an excellent choice for border planting. It creates a stunning visual impact when planted in groups or clusters along garden borders.
  • Container Planting: Due to its compact size, Aster novi-belgii ‘Royal Ruby’ is well-suited for container gardening. It can be used to add color to patios, balconies, and outdoor seating areas.
  • Cut Flower: The long-lasting flowers of the New York Aster make it a popular choice for cut flower arrangements. It adds a touch of elegance to floral displays and bouquets.


Proper watering is essential for the health and vitality of Aster novi-belgii ‘Royal Ruby’. Here are some water-related considerations:

  • Regular Watering: The plant thrives in consistently moist soil. It is important to water it regularly, especially during dry periods, to maintain optimal soil moisture levels.
  • Mulching: Applying a layer of organic mulch around the base of the plant helps to conserve soil moisture and suppress weed growth. This is particularly beneficial during the hot summer months.


Aster novi-belgii ‘Royal Ruby’ has specific sunlight requirements that should be considered when selecting its planting location:

  • Full Sun: The plant prefers full sun, which is defined as at least six hours of direct sunlight per day. Adequate sunlight is essential for promoting healthy growth and abundant flowering.


Proper fertilization is crucial for supporting the growth and flowering of Aster novi-belgii ‘Royal Ruby’. Consider the following fertilization guidelines:

  • Balanced Fertilizer: Apply a balanced, slow-release fertilizer in early spring to provide the plant with the nutrients it needs for vigorous growth and abundant flowering. Follow the manufacturer’s recommendations for application rates.


The soil in which the New York Aster is planted plays a significant role in its overall health and vigor. Here are some soil considerations:

  • Well-Draining Soil: The plant thrives in well-draining soil that prevents waterlogging. Amending heavy clay soils with organic matter can help improve drainage and provide a more favorable growing environment.
  • pH Levels: Aster novi-belgii ‘Royal Ruby’ prefers slightly acidic to neutral soil with a pH range of 6.0 to 6.8. Consider conducting a soil test to assess the pH level and make any necessary adjustments.


Pruning is an important aspect of maintaining the health and appearance of Aster novi-belgii ‘Royal Ruby’. Proper pruning helps promote bushier growth and prolongs the flowering period. Here are some pruning guidelines:

  • Deadheading: Regularly deadhead faded flowers to encourage continuous blooming and prevent the plant from expending energy on seed production.
  • Cutting Back: In late spring or early summer, consider cutting back the plant by 1/3 of its height. This encourages compact growth and increases the overall flower production.


Propagating Aster novi-belgii ‘Royal Ruby’ allows for the expansion of its presence in the garden or landscape. Several propagation methods can be employed, including:

  • Division: Divide mature clumps of the plant in early spring or fall. Each division should have several healthy shoots and a portion of the root system to ensure successful establishment.
  • Stem Cuttings: Propagate the plant from stem cuttings taken from healthy, non-flowering shoots. Dip the cut ends in a rooting hormone before planting them in a well-draining rooting medium.

Container Popularity

The compact size and striking blooms of Aster novi-belgii ‘Royal Ruby’ contribute to its popularity as a container plant. When selecting a container for this plant, it is important to consider the following:

  • Container Size: Choose a container that provides ample space for the plant’s root system to develop. A container with a diameter of at least 12 inches is recommended to accommodate the plant’s growth.
  • Drainage Holes: Ensure that the container has adequate drainage holes to prevent waterlogging, which can lead to root rot and other issues.

Common Diseases

Despite its resilience, Aster novi-belgii ‘Royal Ruby’ is susceptible to certain diseases that can affect its overall health and appearance. Common diseases of this plant include:

  • Powdery Mildew: A fungal disease that often appears as a powdery white coating on the leaves. To prevent powdery mildew, ensure proper air circulation around the plant and avoid overhead watering.
  • Aster Yellows: This phytoplasma disease can cause distorted growth and yellowing of the leaves. Control measures include removing and disposing of infected plants and controlling the leafhopper vectors.

Disease Diagnosis

Diagnosing diseases in Aster novi-belgii ‘Royal Ruby’ involves careful observation of the plant’s symptoms and timely intervention. Here are some steps for disease diagnosis:

  • Symptom Identification: Look for unusual spots, discoloration, or distortions on the leaves and stems. Take note of any changes in the plant’s overall appearance and growth.
  • Pathogen Identification: If a disease is suspected, consider consulting with a plant pathologist or horticulturist to identify the specific pathogen responsible for the symptoms.

Common Pests

In addition to diseases, Aster novi-belgii ‘Royal Ruby’ is vulnerable to attacks from certain pests. Common pests that may affect this plant include:

  • Aphids: These small, soft-bodied insects feed on the plant’s sap, causing stunted growth and the development of sticky honeydew on the leaves.
  • Spider Mites: These tiny arachnids can cause stippling and discoloration of the leaves, leading to weakened plant vigor.

Botanist’s Tips

For optimal success in cultivating Aster novi-belgii ‘Royal Ruby’, consider the following tips from experienced botanists and horticulturists:

  • Site Selection: Choose a planting location with well-draining soil and ample sunlight to promote healthy growth and prolific flowering.
  • Mulching: Apply a layer of organic mulch around the base of the plant to conserve soil moisture and suppress weed growth.

Fun Facts

Here are some intriguing and delightful facts about Aster novi-belgii ‘Royal Ruby’ that showcase its unique characteristics and appeal:

  • Native to North America: The New York Aster is native to the eastern regions of North America, where it can be found in natural habitats such as meadows and open woodlands.
  • Attracts Pollinators: The plant’s vibrant flowers attract pollinators such as bees and butterflies, contributing to the overall biodiversity of the garden.

Links to External Resources

For further information about Aster novi-belgii ‘Royal Ruby’, its cultivation, and maintenance, consider exploring the following external resources:

In conclusion, the Aster novi-belgii ‘Royal Ruby’, or New York Aster, is a captivating plant that offers a wealth of visual splendor and ornamental value. By understanding its specific cultural requirements and addressing its needs with care and attention, gardeners can successfully cultivate and enjoy the vibrant beauty of this remarkable perennial.

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Peter Taylors

Expert botanist who loves plants. His expertise spans taxonomy, plant ecology, and ethnobotany. An advocate for plant conservation, he mentors and educates future botanists, leaving a lasting impact on the field.