Chrysanthemum Chrysanthemum 'Cassandra' (5b)

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
chrysanthemum 'Cassandra'


Chrysanthemum 'Cassandra' is a vibrant, bushy perennial commonly known as a garden mum or a chrysanthemum. Its appearance is highlighted by an abundance of daisy-like flowers that possess a rich golden-yellow hue with striking centers that are often a deeper shade or a contrasting color. The blooms are composed of a dense arrangement of petals that radiate around a central disk, creating a full and lush look. The foliage of the Chrysanthemum 'Cassandra' is equally attractive, with deep green leaves that have a slightly lobed and toothed edge, which provides a lovely contrast to the brightness of the flowers. The leaves are attached to the plant's stem, which tend to branch outwards, giving the plant a rounded and mounded form. This ornamental beauty is a popular choice for gardeners who wish to add a splash of autumnal color to their garden palette, as it typically flowers in the fall when many other plants begin to fade. The chrysanthemum's showy blossoms and robust foliage make it not only a highlight in garden beds and borders but also a favorite for cut flower arrangements, where it lends a cheerful and festive touch.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Garden Mum, Florist's Chrysanthemum, Hardy Chrysanthemum.

    • Common names

      Dendranthema grandiflorum 'Cassandra', Chrysanthemum grandiflorum 'Cassandra', Ajania pacifica 'Cassandra'.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      1-2 feet (30-60 cm)

    • Spread

      1-2 feet (30-60 cm)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Attracts Pollinators: Chrysanthemum 'Cassandra' provides nectar and pollen for bees and other beneficial insects.
    • Aesthetic Appeal: With vibrant blooms, it adds color and beauty to gardens and landscapes.
    • Extended Blooming Season: This variety often has a long flowering period extending into late fall.
    • Easy to Grow: Chrysanthemums are known for being low-maintenance and hardy in various conditions.
    • Drought Resistance: Once established, it can tolerate periods of low water, making it suitable for xeriscaping.
    • Versatility: Suitable for planting in borders, pots, and as a cut flower in floral arrangements.
    • Cold Hardy: Being zone 5b hardy, it can survive through colder temperatures in winter.
    • Pest Resistance: Chrysanthemums can be resistant to many common garden pests, reducing the need for pesticides.

  • medicalMedical Properties

    • This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Chrysanthemum tea: In some cultures, the flowers of chrysanthemums are dried to make a relaxing herbal tea.
    • Companion planting: Chrysanthemums can be planted among vegetables as they are thought to repel harmful insects with their natural pyrethrin content.
    • Art and craft: The flowers can be used for their shapes and colors in dried flower arrangements or potpourri.
    • Natural dye: Chrysanthemum blooms can be used to produce a natural yellow or golden dye for fabrics and yarns.
    • Festive décor: In Japan, chrysanthemums are arranged for the Festival of Happiness to celebrate the flower’s beauty and significance.
    • Photography: Chrysanthemum 'Cassandra' with its distinctive color and form, makes an excellent subject for botanical photography.
    • Educational tool: Used in schools or educational programs to teach about plant biology, botany, or the life cycle of plants.
    • Floral displays: They are often featured in public and private gardens for autumn displays, sometimes arranged in intricate patterns or designs.
    • Culinary garnish: Edible varieties of chrysanthemum flowers are used as a colorful, fancy garnish in fine dining.
    • Water purification: Research has indicated the potential of chrysanthemum species to phytoremediate water contaminated with heavy metals.

Interesting Facts

  • bedFeng Shui

    Chrysanthemum is associated with happiness and well-being in Feng Shui. To use chrysanthemums, place them in living areas to introduce yang energy and promote good health and longevity. They can also be used in the center of the home to foster stability and grounding.

  • aquariusZodiac Sign Compitability

    The chrysanthemum is not used in astrology practice.

  • spiralPlant Symbolism

    • Longevity: The Chrysanthemum, often called "mum" for short, is commonly associated with long life and enduring vitality due to its robust nature and long blooming period.
    • Loyalty: Mums are thought to represent fidelity and devotion, reflecting the flower’s tendency to stay blooming and vibrant even as the colder months arrive.
    • Rebirth: Mums can symbolize reincarnation and new life, as they often bloom in the fall, a season typically associated with the end of life cycles.
    • Joy: In many cultures, mums are a symbol of happiness and cheerfulness, their bright and varied colors bringing light to the shorter days of autumn.
    • Beauty: The aesthetic appeal of the mum, with its intricate layers of petals, symbolizes beauty and grace in cultural contexts.

Every 3-7 days
5000 - 25000 Lux
Every 1-2 years
Spring-Early summer
As needed
  • water dropWater

    Mums require consistent moisture, so water Chrysanthemum 'Cassandra' when the top inch of soil feels dry to the touch. They typically need to be watered once a week, but during hot, dry periods, this may increase to twice a week. Deep, thorough watering is preferable to frequent, shallow watering. Aim to provide about one gallon of water per plant for each watering session to ensure the soil is moistened adequately. To avoid disease, water early in the day so the foliage has time to dry.

  • sunLight

    Mums thrive in full sunlight, so Chrysanthemum 'Cassandra' should be placed in a location where it receives at least 6 hours of direct sun per day. An ideal spot would be in a south-facing garden that stays bright throughout most of the day. Avoid heavily shaded areas, as insufficient light can lead to poor blooming and leggy growth.

  • thermometerTemperature

    Chrysanthemum 'Cassandra' performs best in cool to moderate temperatures and can handle minimum temperatures down to 20 degrees Fahrenheit. The ideal temperature range for robust growth and flowering is between 60 and 75 degrees Fahrenheit. However, mums can survive temperatures up to 90 degrees Fahrenheit, although prolonged heat can be stressful for the plant.

  • scissorsPruning

    Pruning mums is essential to promote bushier growth and more blooms. Chrysanthemum 'Cassandra' should be pinched back in the early summer when shoots are 6-8 inches tall, by removing the tip to encourage side branching. Repeat the process every two to four weeks until mid-July for a fuller plant with more flowers. The best time for pruning is late spring through midsummer before flower buds form.

  • broomCleaning

    As needed

  • bambooSoil

    Mums thrive best in a well-draining soil mixture with good organic matter content. A combination of garden soil, peat moss, and perlite or vermiculite in equal parts works well to provide the necessary drainage and aeration. The ideal soil pH for Chrysanthemums, including 'Cassandra,' is slightly acidic to neutral, ranging from 6.0 to 7.0.

  • plantRepotting

    Mums should be repotted every one to two years to ensure they have enough room to grow and to replenish the nutrients in their soil. When repotting, choose a pot that is slightly larger than the current one to give roots space to spread.

  • water dropsHumidity & Misting

    Mums prefer moderate environmental humidity levels, ranging from 40% to 60%. Maintaining this humidity range helps encourage healthy growth and vibrant blooms in Chrysanthemum 'Cassandra'.

  • pinSuitable locations

    • Indoor

      Place Mums in bright, indirect light and keep soil moist.

    • Outdoor

      Plant Mums in a sunny spot with well-draining soil.

    • Hardiness zone

      5-9 USDA

  • circleLife cycle

    The Chrysanthemum 'Cassandra', or hardy garden mum, begins its life as a seed, which germinates when the soil temperature and moisture conditions are favorable, typically in spring. Upon sprouting, the seedling grows into a vegetative state where it develops a rosette of leaves and a strong root system during late spring to early summer. As summer progresses, the plant enters the budding stage, where flower buds form as daylight hours start to decrease, leading to full blooming in late summer to fall when the plant displays its vibrant flowers. After flowering, in response to shorter days and cooler temperatures, the mum enters a period of dormancy throughout the winter months. In the spring, it may re-emerge from the same root system if it was well-protected and in a suitable climate (USDA zone 5b is at the colder end of its hardiness range). This perennial cycle of growth, flowering, and dormancy repeats annually, with proper care and favorable conditions.

  • sproutPropogation

    • Propogation time

      Spring-Early summer

    • The most popular method of propagation for Chrysanthemum 'Cassandra' is through division. This process typically takes place in the spring as the plant begins to emerge and is still compact. To propagate by division, one should carefully dig up the entire plant, making sure to keep the root ball intact. Once excavated, the clumps can be gently separated by hand or with a sharp knife into smaller sections, ensuring that each new section has a good amount of roots and shoots. These new divisions can then be transplanted into well-prepared soil that has been enriched with compost, spaced appropriately to allow room for growth. It is important to water the new plants thoroughly after planting to help establish them. This method is effective because it not only helps to rejuvenate older plants by giving them more space to grow but also increases the number of plants in the garden.