Round-leaf Mint Bush Prostanthera rotundifolia

👤 Non-toxic to humans
🐾 Non-toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Easy-care
round-leaved mint bush


The Australian mint bush, often referred to simply as mint bush, is a delicate and aromatic plant known for its distinctive features. It has small, round, and bright green leaves that give off a minty scent when brushed or crushed. During the flowering season, this bush becomes adorned with attractive, tubular flowers that can range in color from a soft lavender or lilac to a more vivid purple, adding a splash of color to gardens. The flowers are usually arranged in tight clusters, which provide a striking contrast against the green foliage. The overall appearance of the mint bush is one of a lush and compact shrub, with a slightly rounded and bushy habit, making it a popular choice for gardeners looking to introduce both visual appeal and a refreshing fragrance to their landscape.

Plant Info
Common Problems

About this plant

  • memoNames

    • Family


    • Synonyms

      Round-leaf Mint Bush, Native Thyme.

    • Common names

      Prostanthera rotundifolia.

  • skullToxicity

    • To humans

      Prostanthera rotundifolia, commonly known as round-leaf mint bush, is not widely known to be toxic to humans. There are no significant reports or well-documented cases of poisoning from consuming or coming into contact with this plant. However, like with any plant material, individual allergic reactions or sensitivities are possible, and it is generally advisable not to consume plant material that is not known to be edible.

    • To pets

      Round-leaf mint bush, or Prostanthera rotundifolia, is not commonly known to be toxic to pets. There is limited information on the plant's toxicity towards animals, but it does not appear on lists of plants that are known to be poisonous to pets. As with humans, while there may not be a known significant risk of toxicity, pets should also be discouraged from ingesting this plant due to the potential for individual sensitivities or allergic reactions.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      3 feet [0.91 meters]

    • Spread

      5 feet [1.52 meters]

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Ornamental Value - Prostanthera rotundifolia, commonly known as Round Leaf Mint Bush, is appreciated for its aromatic foliage and attractive purple flowers, making it a popular choice for ornamental gardens and landscape designs.
    • Habitat for Wildlife - The dense foliage and flowers provide shelter and food for a variety of wildlife, including beneficial insects and birds.
    • Aromatic Qualities - The leaves of the Round Leaf Mint Bush release a pleasant minty fragrance when crushed, which can enhance the sensory experience of a garden setting.
    • Drought Tolerance - Once established, Prostanthera rotundifolia is recognized for its ability to withstand periods of dryness, making it a good choice for water-wise gardens.
    • Cultural Significance - It holds cultural significance for indigenous peoples in its native regions, often used in traditional practices and ceremonies.

  • 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

    • As a natural insect repellent: The oil from Australian mint bush leaves can be used as an insect repellent due to its strong aromatic properties.
    • In culinary applications: The leaves of Australian mint bush can be used as a flavoring agent for lamb, game, and poultry dishes, providing a unique mint-like flavor.
    • As a source of essential oil: The plant is used for the extraction of essential oils that can be used in perfumery and aromatherapy products.
    • For educational purposes: Australian mint bush can be used in botanical studies and horticulture education to teach about Australian native plant species and their adaptations.
    • In landscape design: The Australian mint bush is popular in ornamental horticulture for its attractive flowers and aroma, adding sensory appeal to gardens.
    • For crafting purposes: Dried leaves and flowers of the Australian mint bush may be used in potpourri mixtures, adding fragrance to homes.
    • As a natural dye: The leaves can be used to extract natural dyes for fabric or craft projects, offering an earth-friendly coloring option.
    • In the creation of botanical art: Artists may use the flowers and leaves as subjects for paintings, photography, and other art forms that showcase the beauty of native Australian flora.
    • To attract beneficial insects: The Australian mint bush can be planted to attract pollinators like bees and butterflies, promoting biodiversity in the garden.
    • As a mood enhancer: The pleasant scent of the Australian mint bush is known to have a relaxing effect, making it suitable for use in spaces designed to promote calmness and well-being.

Interesting Facts

  • bedFeng Shui

    The Australian Mint Bush is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    The Australian Mint Bush is not used in astrology practice.

  • spiralPlant Symbolism

    • Resilience: Prostanthera rotundifolia, commonly known as Round-leaf Mint Bush, is a hardy plant, able to survive in various conditions which symbolizes one's ability to adapt and endure challenges.
    • Restoration: Due to its refreshing aroma similar to mint, the Round-leaf Mint Bush represents revival and the refreshing of one's soul or environment.
    • Healing: The mint-like scent and traditional use in herbal remedies suggest healing properties, both physical and emotional.
    • Protection: In some cultures, mint plants are believed to offer protection, and thus the Round-leaf Mint Bush might be associated with guarding against negative energies.
    • Cleansing: The aromatic qualities of the Round-leaf Mint Bush contribute to its symbolism of purification, cleaning the air as well as the spirit.

Every 1-2 weeks
2500 - 10000 Lux
Every 2-3 years
Spring to early summer
As needed
  • water dropWater

    Australian mint bush should be watered regularly, especially during its growing season in spring and summer. Aim to keep the soil consistently moist but not waterlogged. You should water the plant about once a week, but always check the soil moisture first; if the top inch of soil is dry, it's time to water. Provide approximately half a gallon of water for outdoor plants and adjust according to the pot size for indoor plants. During the cooler months, reduce watering frequency as the plant requires less moisture.

  • sunLight

    Australian mint bush thrives in full sun to partial shade conditions. It prefers a spot that receives at least six hours of sunlight daily but can tolerate some afternoon shade, especially in hot climates. Placing the plant in an east or west-facing garden will ensure it gets the ideal amount of light without the harsh midday sun.

  • thermometerTemperature

    The Australian mint bush prefers temperate climates with temperatures ranging from 50°F to 86°F. It can withstand brief periods of colder weather, but temperatures dropping below 32°F can damage or kill the plant. The ideal growing temperature is between 65°F and 75°F for optimal growth and flowering.

  • scissorsPruning

    Pruning the Australian mint bush promotes bushier growth and encourages more blooms. Prune in late winter or early spring before new growth begins. Remove any dead or damaged branches and lightly shape the plant to the desired form. Pruning can be done annually, or as needed, to maintain size and shape.

  • broomCleaning

    As needed

  • bambooSoil

    Australian Mint Bush thrives in well-draining soil with a pH range of 5.5 to 6.5. A mix of 60% potting soil, 30% perlite, and 10% peat moss can be ideal. Keep the soil lightly moist but not waterlogged.

  • plantRepotting

    Australian Mint Bush should be repotted every 2-3 years to prevent root-bound conditions and replenish nutrients in the soil.

  • water dropsHumidity & Misting

    Australian Mint Bush prefers moderate humidity levels, around 40-50% humidity, which is typical of many indoor environments.

  • pinSuitable locations

    • Indoor

      Place Australian Mint Bush in bright, indirect light and ensure good air circulation indoors.

    • Outdoor

      Plant Australian Mint Bush in partial shade and shelter from strong winds.

    • Hardiness zone

      8-11 USDA

  • circleLife cycle

    Prostanthera rotundifolia, commonly known as Round-leaf Mint Bush, begins its life cycle as a seed, which germinates in favorable conditions of moisture and temperature, typically in the spring. The seedling emerges and develops into a juvenile plant with characteristic round, aromatic leaves and a robust root system. As it matures into an adult, the Round-leaf Mint Bush experiences vegetative growth, forming a woody shrub up to 2 meters tall with multiple branches. During its reproductive stage, usually in the spring and summer, it produces abundant purple to blue flowers, attracting pollinators for sexual reproduction. Following pollination, the plant develops small fruits containing seeds that, once mature, can be dispersed to new locations, perpetuating the species. Finally, after several years, the Round-leaf Mint Bush completes its lifecycle, typically dying back in the winter to re-emerge from its root system or newly germinated seeds the following spring.

  • sproutPropogation

    • Propogation time

      Spring to early summer

    • Prostanthera rotundifolia, commonly known as Round-leaved Mint Bush, is often propagated through semi-hardwood cuttings. The ideal time for this method is late summer to early autumn. To propagate, a gardener would take a cutting of about 4 to 6 inches (10 to 15 cm) long from a healthy part of the plant, preferably with several sets of leaves. The lower leaves are stripped off and the cut end of the stem is dipped into rooting hormone to encourage root development. The cutting is then planted in a pot filled with a well-draining potting mix and kept moist until roots have established, which typically takes several weeks. It's important to place the pot in a warm area with indirect sunlight and maintain a high humidity around the cutting, often achieved by covering the pot with a plastic bag or propagation dome to create a greenhouse effect.