Cosmea 'Cosimo Red-White' Cosmos bipinnatus 'Cosimo Red-white' (Cosimo Series)

👤 Non-toxic to humans
🐾 Non-toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
cosmea 'Cosimo Red-White'


'Cosimo Red-White' is a relatively compact cultivar of this half-hardy annual, up to 60cm tall. It has the characteristic finely-divided, feathery foliage and bears bicoloured flowers, striped in shades of red, white and purple, from summer into autumn

Plant Info
Common Problems

About this plant

  • memoNames

    • Synonyms

      Mexican Aster, Garden Cosmos, Cosmea.

    • Common names

      Cosmos bipinnatus 'Cosimo Red-white'.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      2 feet (61 cm)

    • Spread

      1 foot (30 cm)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Attracts Pollinators: Cosmos bipinnatus 'Cosimo Red-white' attracts bees, butterflies, and other beneficial insects, contributing to a healthy ecosystem.
    • Easy to Grow: This variety of cosmos is known for being low-maintenance and easy to cultivate, even for novice gardeners.
    • Drought Tolerance: Once established, it is tolerant of drought, reducing the need for frequent watering.
    • Ornamental Appeal: The plant features eye-catching red and white bicolored flowers that can enhance the visual appeal of gardens and landscapes.
    • Extended Blooming Season: Cosmos plants have a long flowering period, often from early summer until the first frost, providing long-lasting color.
    • Adaptability: It can thrive in a range of soil types, provided they are well-draining, making it a flexible choice for different garden conditions.
    • Cut Flowers: The blooms are excellent for cutting and can add beauty to indoor floral arrangements.
    • Easy to Propagate: They can be easily propagated by seed, allowing gardeners to create more plants without additional cost.
    • Self-seeding: Cosmos bipinnatus 'Cosimo Red-white' may self-seed under suitable conditions, providing new plants for the following season with minimal effort.

  • 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

    • Photography backdrop: The vibrant red and white colors of Cosmos can provide a striking background for photographic portraits or macro photography.
    • Edible garnish: The petals of Cosmos flowers are edible and can be used to add a splash of color and mild flavor to salads and desserts.
    • Dye production: Cosmos flowers can be used to create natural dyes for fabrics, giving them a soft pink to red hue.
    • Artistic inspiration: The bright flowers can inspire artists and be used as a subject in paintings, drawings, and other art forms.
    • Crafting: Dried Cosmos flowers can be incorporated into paper-making, pressed flower art, or potpourri.
    • Children's projects: Cosmos flowers can be used for educational purposes, such as teaching children about plant biology or for simple gardening projects.
    • Homemade cosmetics: The petals can be infused in oils to create natural, homemade cosmetics like balms and soaps.
    • Colorful mulch: Once Cosmos flowers have lost their bloom, they can be used as a colorful, organic mulch in the garden.
    • Bookmark decoration: Pressed Cosmos flowers can be laminated or used in clear resin to create decorative bookmarks.
    • Festive decoration: During celebrations or festivals, fresh or dried Cosmos flowers can be used to create garlands or table centerpieces.

Interesting Facts

  • bedFeng Shui

    Cosmos is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    Cosmos is not used in astrology practice.

  • spiralPlant Symbolism

    • Love: The red in 'Cosimo Red-white' cosmos often signifies deep love and passion, making them a thoughtful gift for a romantic partner.
    • Harmony: With its balanced color combination, the cosmos represents harmony and a balanced universe.
    • Innocence: The white in these flowers can symbolize purity and innocence, suggesting a gentle, untainted affection.
    • Beauty: Cosmos flowers in general are admired for their aesthetic appeal and are often used to represent beauty in both its physical and inner forms.
    • Peace: White is a common symbol of peace and tranquility, making the 'Cosimo Red-white' a fitting flower to represent serene wishes.

Every 5-7 days
2500 - 10000 Lux
Every year
As needed
  • water dropWater

    Garden cosmos should be watered regularly, aiming for at least an inch of water per week, either from rainfall or manual watering. Water deeply once a week to encourage strong root growth, rather than light waterings daily. During particularly hot or dry periods, you may need to water them more frequently. If you're using a container, check the soil moisture more often, as pots can dry out faster than garden soil. It's best to water early in the morning to reduce evaporation and allow foliage to dry out over the day, minimising the risk of fungal diseases.

  • sunLight

    Garden cosmos thrives in full sun, where it can receive at least 6 to 8 hours of direct sunlight daily. The ideal spot would be an open area without shade from trees or buildings to ensure ample light and promote the most vigorous growth and flowering.

  • thermometerTemperature

    Garden cosmos are quite tolerant of a range of temperatures, but they grow best when daytime temperatures are between 75°F and 90°F. They can survive minimum temperatures down to about 25°F but will start to suffer damage if it gets colder. For optimal growth, keep them in conditions that avoid the extremes of very hot or freezing temperatures.

  • scissorsPruning

    Pruning garden cosmos by deadheading, or removing spent flowers, encourages more blooms and extends the flowering season. You can also cut them back by one-third in midsummer if the plants are getting leggy. Pruning should be done regularly throughout the flowering season, usually every few weeks, to keep the plants looking tidy and encourage more blooms. The best time for pruning is when the flowers start to wilt and before they set seed.

  • broomCleaning

    As needed

  • bambooSoil

    The best soil mix for Cosmos (Cosmo Series) is well-draining, fertile, loamy soil with a pH of 6.0 to 8.5. You can prepare a mix using equal parts of garden soil, compost, and perlite or sand to ensure proper drainage and fertility.

  • plantRepotting

    Cosmos (Cosmo Series) are typically grown as annuals and therefore do not require repotting. If started in containers, transplant them to the garden or larger pots when seedlings are large enough to handle.

  • water dropsHumidity & Misting

    Cosmos (Cosmo Series) are not particularly humidity-sensitive and do well in average garden conditions. They do not require high humidity levels, making them ideal for a variety of outdoor environments.

  • pinSuitable locations

    • Indoor

      Provide bright light and well-draining soil for Cosmos indoors.

    • Outdoor

      Plant Cosmos in full sun, well-draining soil, after last frost.

    • Hardiness zone

      Cosmos (Cosmo Series) are suited for USDA zones 2-11.

  • circleLife cycle

    The life of Cosmos bipinnatus, commonly known as Cosmos, begins with seed germination, which occurs in warm soil after the last frost when temperatures are around 75°F (24°C). Seedlings emerge and grow into young plants with feathery foliage, which typically occurs within 7-21 days post sowing. As the plants mature, they develop long slender stems and finely cut leaves, reaching a flowering stage in about 7 weeks, where they display their characteristic red-and-white bicolored blooms. Cosmos flowers attract a variety of pollinators, and if left to their own devices, the flowers eventually fade to form seed heads, which contain seeds for the next generation. The plants continue to produce flowers throughout the growing season until the first frost. At the end of the growing season, cosmos plants die back, completing their life cycle as annuals.

  • sproutPropogation

    • Propogation time


    • Cosmos, particularly the Cosmos bipinnatus 'Cosimo Red-white', is most commonly propagated by seed. The best time to sow Cosmos seeds is after the last frost when the soil has warmed, usually between late March and May in the Northern hemisphere. To propagate, evenly distribute the seeds on top of well-drained soil and lightly cover them with about 1/8 inch (approximately 3 millimeters) of additional soil. Keep the soil moist but not waterlogged until germination, which typically occurs within 7 to 10 days. Once the seedlings have developed a few sets of true leaves and are sturdy enough to handle, they can be thinned or transplanted to give them adequate space to grow. Cosmos thrives in full to partial sunlight and prefers well-draining soil.